I have a look at the energynumbers site every now and then; on occasion solar shows challenging wind with up to 6GW. The site is often slow to display any solar and I know it's difficult to estimate.
What I wonder is how much of the solar PV power is from roof top panels and how much solar farms? I would have thought the domestic user displacing their retail electricity costs would have been a better bet than a solar farm competing with wholesale prices.
My opinion is that the government[1] cut the FIT far too early, I would think the costs of the support needed to prop up electricity bills during the recent crisis would be far higher than supporting a doubling of domestic PV.
[1] I also think this current government are biased against green initiatives in general given they are about to emasculate Natural England for opposing developments that will impact water quality and the PM's global jetting about.