‘Until March 2019, the UK operated an immigration policy – set out in Chapter 60 of the General Instructions to Home Office caseworkers – that worked like this: if a migrant did not have leave to enter or remain in the UK (that is, if they were an “irregular migrant”), the Secretary of State for the Home Department could serve a “notice of removal window”. After a short notice period (usually just 72 hours), the “removal window” (usually 3 months) would open. During the removal window, the migrant could forcibly be removed at any time, without further warning.’
Oxford Human Rights Hub, 16th November 2020
Source: ohrh.law.ox.ac.uk
