The CAA doc from 29th April can be found here:
https://publicapps.caa.co.uk/docs/33/CAP1789 April 2020.pdf
It is worthwhile reading rather than some of the misinterpretations I have seen in certain youtube channels.
As I understand it, the term UAS (unmanned air system) was intended to also cover RC Fixed Wing aircraft.
However, I suspect that the majority of people who fly RC fixed wing do so at BMFA clubs or similar. Not really doing much photography above where people are (i.e. countryside with paths) on the whole.
I suspect that those that do, are probably pretty confident already in their abilities and would have previously done the BMFA certs. anyway.
Where this hurts really are the hobbyists who don't have a flying club near them, as they would come under the special permits section I believe.. After July 2022 it will not be legal to fly 'near' people. Unless it is below 250g (so mavic mini, in theory without guard), it will be A3 only. Quoting Article 20:
Article 22:
Main body definition of A3:
Apart from Woods (which might come under the classification of recreational anyway), I can't think of anywhere that doesn't fit in the categories above.