The graph showing people in hospital with Covid-19 in Wales shows there has not been the decline that has been seen in other areas of the UK. Some of this may be down to a change in the methods of reporting. It looks, though, that there are more people in hospital with Covid-19 in Wales than there are in London. Considering density of population, plus the fact that the population of London is almost 3 times that of Wales, then easing the lockdown in some of those areas in your link is rightly being done more gradually in Wales.