This week: oh god, she’s calling it Kemistry. Also: why is every English word for toilet a euphemism? And some notes on Winston Churchill’s cats.

Officials were recorded by undercover journalists discussing a potential way to secure foreign donations to the party.

Many claims are made about the effects of different voting systems, but to what extent are these backed up by evidence? And how might this evidence apply to Westminster elections? Alan Renwick introduces a new Constitution Unit project seeking to answer these questions in a way that is accessible for politicians, campaigners, journalists, and the public at large.

The questions I’ve been asked most after Andy Burnham’s speech - and what the answers are.

With record-high Mediterranean temperatures and a year's worth of rain falling in mere hours, Spain has been devastated by the weather phenomenon known as DANA.