From 24 October, returning travellers will only require a lateral flow test instead of the more expensive PCR. This applies in England but is likely to be adopted by other home nations in time for the winter.
If you’re planning to get on snow in Europe this winter it is likely to be difficult without a vaccine passport (app or paper copy). It will be a condition in many nations to access bars, restaurants and hotels – in Austria it will also be required to access cable cars.. Check your destination country here https://www.gov.uk/foreign-travel-advice