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Prof Cathryn Costello

@profccostello.bsky.social
843 followers 1.8K following 57 posts

Full Prof of Global Refugee and Migration Law, Sutherland School of Law, UCD; ex-Refugee Studies Centre, University of Oxford; ex-Centre for Fundamental Rights, Hertie School, Berlin. Recent return migrant after two decades.

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Prof Cathryn Costello @profccostello.bsky.social · 05/11/2025
Woke up to this. A city I love, making a great choice!
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Daniele Saracino @dansaracino.bsky.social · 26/10/2025
A few flashlights from my latest open access publication with @judithkohlenberger.bsky.social and @bernd-parusel.bsky.social in the European Journal of Migration and Law: (1/4) brill.com/view/journal...
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Ben Tonra @bentonra.bsky.social · 24/10/2025
Tremendous event 26 November between @northeasternu.bsky.social and @ucddublin.bsky.social - where can we see positive international collaboration even during an era of fragmentation and polarisation? Join us. Contact @bentonra.bsky.social for event registration and feel free to share widely.
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Ben Tonra @bentonra.bsky.social · 22/10/2025
Not good enough. This needs investigation and consequences.
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Steve Peers @stevepeers.bsky.social · 21/10/2025
Joint policy brief on the trafficking of migrant women workers in poorly regulated sectors, by the UN Special Rapporteur on trafficking in people (Siobhan Mullally) and UNWomen - www.linkedin.com/posts/siobh%...
linkedin.com
Addressing the trafficking of women migrant workers in poorly regulated sectors | Siobhán Mullally
Our new joint Policy brief, just published with UN Women, addressing trafficking of women migrant workers in sectors such as agriculture, fisheries, domestic work, hospitality and garment production. ...
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Prof Cathryn Costello @profccostello.bsky.social · 19/10/2025
Never hear about events in my home town Tralee til after the event! Take note #speirgorm Will turn up! Looks great Tedx Tralee!
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Andrea Maria Pelliconi @ampelliconi.bsky.social · 17/10/2025
My post with Sebastian VM on #WesternSahara: does the Commission's new agreement respect the requirements established by the #CJEU in October 2024? In short: nope!
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Prof Cathryn Costello @profccostello.bsky.social · 17/10/2025
Thanks @svaroschi.bsky.social and @mariafarrell.bsky.social I have now read this blistering piece with relish. Highly recommended!
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Antonella Napolitano @svaroschi.bsky.social · 23/09/2025
Without a shift in policy, the dominant trajectory of technology in immigration will continue to be digital surveillance. It doesn't have to be that way. Very glad to talk about our global research on technology and alternatives to detention on @techpolicypress.bsky.social.
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Prof Cathryn Costello @profccostello.bsky.social · 17/10/2025
Looking forward to reading - migration controls - always a weak spot for human rights - now in full autocratic mode ..
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Catherine Briddick @catbriddick.bsky.social · 02/10/2025
My book, out now! On migration law's treatment of women, gender-based violence, and the legal challenges that migrant women have brought to the rules that determine their status. I have links if you want to review a copy or read a free chapter.... global.oup.com/academic/pro...
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Aoife O'Donoghue @aoifemod.bsky.social · 06/10/2025
The Wolfson Report treats #NorthernIreland and the international legal commitments of the UK Government - which are very clearly spelled out in the #1998Agreement - as mere political agreements. Once again it is a Treaty & requires #ECHR rights - not UK versions of them 1/3
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Prof Cathryn Costello @profccostello.bsky.social · 07/10/2025
Thanks @hollycullenfreo.bsky.social for this public service - international labour law at the ICJ!
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Prof Cathryn Costello @profccostello.bsky.social · 02/10/2025
I despair of UK asylum developments - from bad to worse in terms of wrongheaded performative cruelty
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Timothy Snyder @timothysnyder.bsky.social · 02/10/2025
From 1939-1945 German officers also listened to speeches from civilians about how the laws of war didn’t apply to them. And then they participated in the Holocaust, starved millions of prisoners of war, destroyed villages and cities, and were defeated.
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Sonya Cotton @sonyacotton.bsky.social · 28/09/2025
So excited for this event!
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Ahmed Ellaboudy @aellaboudy.bsky.social · 23/09/2025
The programme is here! TriCON New Voices in Constitutional Law Workshop features 6 brilliant ECRs tackling diverse research inquiries, with expert feedback from leading constitutional law academics - plus a keynote session by Prof. Leah Trueblood. @tricondublin.bsky.social
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Laurent Pech 🇺🇦 @profpech.bsky.social · 17/09/2025
"the European Commission presented today its proposal to the Council to suspend certain trade-related provisions of the Association Agreement between the EU and Israel ... as well as its proposals for sanctions on Hamas, extremist ministers and violent settlers" ec.europa.eu/commission/p...
ec.europa.eu
Commission proposes suspension of trade concessions with Israel and sanctions on extremist ministers of the Israeli government and violent settlers
Following the announcement of President von der Leyen in her State of the Union address, the European Commission presented today its proposal to the Council to suspend certain trade-related provisions...
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Sean Rehaag @seanrehaag.bsky.social · 16/09/2025
A busy week... My @refugeelab.ca released our report about tech and alternatives to immigration detention, co-authored by @danghez.bsky.social & @petramolnar.com, and co-published with @kaldorcentre.bsky.social and @idcoalition.bsky.social: www.unsw.edu.au/content/dam/...
Cover image for a report entitled "From Surveillance to Empowerment: Advancing the Responsible Use of Technology in Alternatives to Detention" Accessible text via link
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Aoife O'Donoghue @aoifemod.bsky.social · 04/09/2025
A must read from Guy S Goodwin-Gill - his exortation at the end 'We must make it known that we do not want and will not share our space with war criminals or génocidaires.' & that we must talk & talk about genocide needs to be heard loud & clear among public international law scholars
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Aoife O'Donoghue @aoifemod.bsky.social · 16/09/2025
From myself & @colinmurray.bsky.social on the European Convention on Human Rights & very briefly (bc it is clear) why it is not plausible to claim that it is possible to leave & not breach the 1998 Good Friday/Belfast Agreement.
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British Institute of International and Comparative Law (BIICL) @biicl.bsky.social · 13/09/2025
📢 Marking 75 years of the European Convention on Human Rights (#ECHR) and 35 years of the #VeniceCommission ECHR and Venice Commission: Guarding Human Rights and the Rule of Law, and Facilitating Constitutional Resilience 📌 BIICL, London | 🗓 6–7 Nov 2025 📌 Programme now available buff.ly/hK00usl
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Chris Bertram @crookedfootball.bsky.social · 13/09/2025
Now listened all the way through and repeat my recommendation. But not for squeamish, since has EHCR and Refugee Conv gone in 10 y, possible Farage PM, mass deportation in near future, and EU transformed into vehicle of pan-Euro exclusionary "Christian" nationalism. All avoidable if we fight back.
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The BEYOND project @non-signatory.bsky.social · 10/09/2025
Our new edited volume, Non-signatory States in International Refugee Law, has just been published 📌 The open access book explores the intricate relationship between the international refugee regime and states that are not signatories to the 1951 Convention and its 1967 Protocol. Read the full book:
brill.com
Non-signatory States in International Refugee Law
"Non-signatory States in International Refugee Law" published on 09 Sep 2025 by Brill | Nijhoff.
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Mariana Velasco-Rivera @marianavr.bsky.social · 01/09/2025
Today the elected members to the judiciary in Mexico 🇲🇽 take office and so a new era of sheer uncertainty re the independence & quality of judicial admin begins.
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Migration Observatory @migobs.bsky.social · 29/08/2025
New piece in The Conversation by Rob McNeil and Peter Walsh from @migobs.bsky.social The most radical part of Reform’s deportation plans theconversation.com/the-most-rad...
theconversation.com
The most radical part of Reform’s deportation plans
‘Operation Restoring Justice’ would face legal, logistical and diplomatic hurdles.
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Alison Harvey @aliromah.bsky.social · 23/08/2025
For the 1st time the UK will be the the subject of an @amnesty.org global urgent action. It says this is to "protect the right to protest in the UK, following the arrest, since July 2025, of over 700 people for peacefully protesting in support of Palestine Action" www.amnesty.org.uk/press-releas...
amnesty.org.uk
Amnesty International launches global campaign to protect UK protest rights after Palestine Action arrests
The Urgent Action will involve letters addressed to the UK’s Chief Prosecutors, signed by activists and supporters all over the world.
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Adil Haque @adhaque.bsky.social · 14/08/2025
For my own take, see here: 8/8 t.co/MTYGJRxN2x
t.co
https://www.justsecurity.org/105629/amnesty-international-gaza-genocide-report/
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Adil Haque @adhaque.bsky.social · 14/08/2025
For more on this theme, see this excellent essay: 7/ t.co/FmsD1l3pky
t.co
https://opiniojuris.org/2025/05/26/genocidal-intent-in-armed-conflict-unpacking-the-icjs-only-reasonable-inference-standard/
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Adil Haque @adhaque.bsky.social · 14/08/2025
Ezra Klein's interview with Philippe Sands is very good overall. But I want to reiterate that the ICJ has never said that the definition of genocide requires a "single intent." Nor does the ICJ's standard of proof preclude a finding of genocide in cases of plural intent. 1/🧵
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Dr Mary McAuliffe @drmarymcauliffe.bsky.social · 27/07/2025
#lettheaidin 🇵🇸
Photo of presentation of Sam
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Sally Hayden @sallyhayd.bsky.social · 26/07/2025
Two weeks tomorrow. bsky.app/profile/sall...
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Center for International Environmental Law @ciel.org · 23/07/2025
📢 Happening Today: 3PM CEST ⚖️ The @CIJ_ICJ delivers its Advisory Opinion on climate change and state responsibility. This could reshape global #ClimateJustice. Stay tuned for updates and analysis.
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Toby Murray @tobycmurray.bsky.social · 18/05/2025
xAI’s Grok vividly highlights the potential for generative AI to turbo charge disinformation and concentrate influence power. Just at the time we learn LLMs may be more persuasive than humans bsky.app/profile/cscl...
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The Irish Marie Skłodowska-Curie Office @mariescurie-ire.bsky.social · 20/06/2025
Very useful resources for anyone preparing applications for #MSCA calls 👇
linkedin.com
🔍 POLICY BRIEFS | RADIANCE
🔍 POLICY BRIEFS With all major #MSCA calls now open, it's the perfect time to align your proposal with key European policy priorities. The policy briefs developed by MSCA-NET (now 'RADIANCE&#3...
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The Irish Marie Skłodowska-Curie Office @mariescurie-ire.bsky.social · 19/06/2025
The #MSCA and Citizens call is now open! Check out these tips to prepare your application 👇
marie-sklodowska-curie-actions.ec.europa.eu
MSCA & Citizens call: 6 steps to prepare your application
Get started with this funding scheme and learn how to prepare a successful proposal.
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UNSW Kaldor Centre for International Refugee Law @kaldorcentre.bsky.social · 19/06/2025
Does the Australian government have a duty to repatriate citizens and permanent residents stuck in Iran and Israel? Our own @profjmcadam.bsky.social, Dr Thomas Mulder & @reginajefferies.bsky.social explain what international law says ... theconversation.com/australian-c...
theconversation.com
Australian citizens in Iran and Israel are desperate to leave. Is the government required to help?
While the Australian government has frequently helped its citizens flee crises overseas, it is not legally obligated to do so. And repatriating citizens is complex.
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Branko Milanovic @brankomilan.bsky.social · 18/06/2025
crucial importance of economic growth support for globalization: free movement of factors of production, goods and services moderate inequality economic/technological control of climate change no wars of aggression. www.ft.com/content/5340...
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Donncha O’Connell @donnchalaw.bsky.social · 14/06/2025
Appointments to the Irish Human Rights and Equality Commission (IHREC): publicjobs.ie/en/?option=c...
publicjobs.ie
Job Details
Publicjobs.ie | Ireland's Premier Public Sector Recruitment Website
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Summer School on the International Criminal Court @iccsummerschool.bsky.social · 10/06/2025
Today we discuss the ICC's subject-matter jurisdiction over aggression, crimes against humanity & war crimes. Followed by the keynote lecture of President Silvia Fernández de Gurmendi: "The promotion of human rights through accountability for the gravest crimes" @uniofgalway.bsky.social
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Rahul Rao @rahulraothariel.bsky.social · 07/06/2025
Oxford friends: I'm giving 2 book talks in the-town-where-Rhodes-has-not-fallen on Monday, June 9, 2–4 pm, St Antony's College (in person) www.africanstudies.ox.ac.uk/event/the-ps... and later in the month, courtesy Rhodes House, on June 24 (online) www.rhodeshouse.ox.ac.uk/programmes-e...
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British Institute of International and Comparative Law (BIICL) @biicl.bsky.social · 06/06/2025
Short Course: AI Governance Ideal for legal practitioners, students, academics and all those directing policy around AI implementation who need to critically assess legal, regulatory and policy developments related to #AI. 📅 Starts 8 Oct Find out more buff.ly/Mqcycfd #AI #Training
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Chris Bertram @crookedfootball.bsky.social · 02/06/2025
Labour's immigration white paper is an incoherent self-defeating mess argues @colinyeo.bsky.social
wewantedworkers.substack.com
Settlement and citizenship in Labour's white paper
The proposals will make it harder, not easier, for migrants to integrate, with negative consequences for productivity, growth and the public purse
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Jakub Jaraczewski @jakubjaraczewski.bsky.social · 31/05/2025
🇩🇪⚖️💼Do you want to work with us? We're looking for a programme coordinator with a strong background in human rights/EU law to lead our work on several projects, including our on the Charter of Fundamental Rights and its use in strategic litigation. You'll need an Anmeldung in Berlin, tho. Link below!
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Steve Peers @stevepeers.bsky.social · 30/05/2025
Italian court of cassation asks CJEU about detention of asylum-seeker and irregular migrant under Italy/Albania deal - asks CJEU to fast-track case but could still complicate application of the deal for awhile - ilmanifesto.it/la-cassazion...
ilmanifesto.it
La Cassazione affonda il progetto Albania | il manifesto
Immigrazione (Italia) La Cassazione dubita che il Cpr di Gjader sia compatibile con la direttiva rimpatri e con la direttiva accoglienza. Per questo ieri ha rinviato due cause alla Corte di giustizia ...
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Olúfẹ́mi O. Táíwò @olufemiotaiwo.bsky.social · 28/05/2025
Rest in peace Ngũgĩ wa Thiong’o www.theguardian.com/books/2025/m...
theguardian.com
Ngũgĩ wa Thiong’o, giant of African literature, dies aged 87
Kenyan writer’s death announced by his daughter, who wrote: ‘He lived a full life, fought a good fight’
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Steve Peers @stevepeers.bsky.social · 28/05/2025
EU asylum law Temporary protection for those fleeing the invasion of Ukraine on the agenda for Member States' ministers June 13th - another extension and a recommendation on phasing it out
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Holly Cullen @hollycullenfreo.bsky.social · 28/05/2025
🚨 Important database of cases where lawyers were found to have used AI-hallucinated materials. Covers multiple jurisdictions, mostly anglophone systems.🚨
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Andrew Forde @drandrewforde.bsky.social · 27/05/2025
🚨IDF firing 'warning shots' near diplomats is a violation of the Vienna Convention on diplomatic relations and sets an unacceptable precedent in international relations. My new piece in @theconversation.com theconversation.com/idf-firing-w...
theconversation.com
IDF firing ‘warning shots’ near diplomats sets an unacceptable precedent in international relations
Intimidation of diplomats is unacceptable and threatens the basis of international relations.
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Catherine Briddick @catbriddick.bsky.social · 27/05/2025
'All States, including the UK, are legally obliged to take all reasonable steps within their power to prevent and punish genocide; to ensure respect for international humanitarian law... The UK’s actions to date have failed to meet those standards.' lawyersletter.uk
lawyersletter.uk
UK Judges’ and Lawyers’ Open Letter Concerning the Occupied Palestinian Territory - May 2025 - UK lawyers’ open letter concerning Gaza
Download the full letter and Legal Memorandum | View signatories London26 May 2025 We are lawyers, legal academics and former judges who are UK-based or qualified.  We write owing to our deep concern ...
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