Hard border. Costs of security and Visas to be borne by Piddingtonites. All UK deportees to be passed to the state of Piddington for contracted terms until UK processed. No access to UK mains infrastructure until contracts agreed - conditional on cooperation with the UK proper.
The merits or demerits of the asylum seeker base aside, you might imagine from listening to the BBC that Piddington was an isolated rural village as opposed to already right next to HMP Bullingdon and a bunch of army bases.