Quarter of people meant to isolate after arriving in the UK are not checked for compliance A quarter of those who entered the country from non-red list countries have not been checked up on to ensure they are isolating. Up to a quarter of people who are meant to isolate at home when entering the UK from abroad do not get checked on by the authorities, the Home Office has admitted. In a letter to MP Yvette Cooper, chair of the Home Affairs Select Committee, home secretary Priti Patel admitted that for the week ending 1 March just 75 per cent of those potentially eligible to be contacted by the Isolation Assurance Service (IAS) were successfully contacted.