In Europe, he can stay for only 90 days
that doesn't make any sense for two reasons. first, he only entered the EU in september this year, so either the 90 days are not up yet or he should be in mexico now. is he? but why would he fly to mexico when he could just go to the UK?
but more importantly, he is a british citizen. getting a visa to walk through europe, especially now that he already has a track record of walking for so long should really not be an issue.
That's not the way it works.
I live in Norway, have residence and stuff. I can travel freely through most of europe without much hassle - but I can only travel 90 days out of 180 days - then you gotta go out of the area (or back to your home country if it is inside), stay out or home for 90 days, and then start anew. The closest border to me - one to Sweden - has no real security. A customs office because there is border shopping in the area and I know they very occasionally stop folks. A crossing an slightly inconvenient distance north just has signs.
Anything outside of this requires paperwork.
> but why would he fly to mexico when he could just go to the UK?
Because of one of the original 2 rules he set up from the beginning.
There is no Europe wide long stay non-working visa for UK citizens. 90 in 180 days is the Schengen visitor option, no?
have you tried? I'm a South African living in Europe and visas are a nightmare.
Many europeans have never had to apply for a real visa in their life (I don't mean the online ones, or the apply on arrival ones, I mean the ones where you submit a 20 page form of personal details and hotel bookings and letters from friends you'll be staying with and bank statements and a full travel history) and they assume that I'm just making life difficult for myself by not doing some simpler option that they assume must exist.
I don't know about what visa options UK citizens have for the EU since brexit, but I'd be surprised it was as simple as "I feel like spending more than the 90 days I get".