https://www.breitbart.com/europe/2021/07/21/uk-border-force-no-longer-routinely-checking-corona-tests-of-arrivals-report/
UK border officers have been directed to stop routinely checking whether travelers from many countries have tested negative for COVID-19.
uk border forceno longercheckingcoronatests
https://www.gov.uk/guidance/what-you-can-do-if-things-are-seized-by-hmrc-or-border-force
Find out what to do if you have something seized (Notice 12A).
you canthingsseizedhmrc