I think what's being lost on some people is that there are over 8 million PS4 and & XBox One owners combined in the UK compared to a little over 245 thousand Switch owners (just going off this chart http://www.vgchartz.com/yearly/2017/UK/):
PS4 - 498,600 (10.82% of PS4 owners in UK)
XB1 - 307,470 ( 8.02% of XBox One owners in UK)
NSW - 8,310 ( 3.39% of Switch owners in UK)