I think that it is important to consider that the UK has one of the highest testing rates in the world.
So far, in this pandemic UK has carried out over 318 million tests.
Thailand, with a slightly larger population has carried out a total of just over 9 million tests.
One has to wonder how many cases would be found in Thailand if testing was carried out to the same scale as the UK!
The vast majority in the UK have no symptoms or non-serious, hence there are only 7,000 currently in hospital.