The ONS published their extrapolated data that showed a week ago that 1 in 15 people in England had covid, whereas in Wales and Scotland it was 1 in 20.
There's too many variables to make conclusions from 1 set of data. For example, school children are testing 3 times a week in Wales, but twice in England.
Also, there's no mention of whether the Welsh or English numbers include people who tested positive after watching a football match in Chester 😁