Apple series 5 watch

From all I have read on this subject, the GPS part should work, however if you would need to have the watch serviced you would have to do it in the US. I would strongly advise you to purchase the watch in England.

The only problem you would have as julieda pointed out is if the watch needed repair under warranty,the warranty is only valid in the country that the watch was bought.The watch it's self will work perfectly well in the UK.Don't get the cellular version though as the cellular part of the watch won't work in the UK.