Every country has had different measures to contain and control this pandemic. This may include shutting down borders to any international travellers or countries with high cases or mandatory tests before and/or after travelling. I personally think the UK could've done much better such as closing borders down temporarily as that is part of the reason in the spread of the mutant virus and just general increase in the case. The lockdown restrictions aren't really enforced in my opinion and this is another factor in the risings and the handling by the government has been purely shit.