All this lot is UK based.
I won't go around this again, beyond saying that the "powers that be" can't just say "no remuneration after 60". There has to be a rule/regulation/requirement written down somewhere. The one that I quoted does not say - no remuneration/no commercial work after 60;
it DOES say - no single pilot public transport after 60
which is a bit different.
My suggestion is that a CPL/ATPL aged between 60 and 65 can fly single pilot/multi crew and be paid for aerial work (including instruction). He can also do a private cat flight for which he is paid.
Get the "powers that be" to quote the legal requirement that prevents such a pilot from being paid after 60.