The UK government has placed Dominican Republic on the "red list" which means that nobody who has been in Dominican Republic in the last 10 days will be allowed to enter the UK unless they are a UK national or have residency. So if a US national for example had recently been to DR they would not be allowed to enter. Brits who return from Dom Rep are forced to pay £1,750 per adult for a 11 night stay in a hotel where they are only allowed out of their rooms for 1 hour a day. This is due to the rise in Covid cases in DR. Haiti has also been put on the list. The red list is reviewed every 3 weeks, but so far none of the countries on the red list have come off the list, so it may be quite a while before we see British tourism return to DR.