This is quite misleading.
The RRP at the beginning of the PS4 generation was
£59.99
The RRP at the beginning of the PS5 generation is £69.99
Over time, in the UK, publishers and retailers will tune these prices to maximise profit, which will see them fall significantly. Right now it does constitute a jump of around £20
but half, if not more of that, is not being driven by Sony, it's being driven by the standard next-gen tax which we see every generation. RRP have risen like this every generation - Microsoft pushed us to £49.99 in 2005, and Sony to £59.99 in 2013 and now we're at £69.99 in 2020. The wheels didn't come off in 2005, or 2013, or 2020.
As every person in the UK knows, RRP doesn't really mean that much. It's a guide that retailers will move further and further from.