Rental costs are lower in Spain but not much use if you can’t get a job. If you are unemployed in the UK the rent is paid.
I don’t think the desire that fed the last property boom will return for more than a decade, if ever. It is totally different from the last slump. It was like the south sea bubble, tulip bubble etc.
Of course there will be some buyers, mainly pensioners with decent pensions. Similar to how it was in the 80’s. All that Russian stuff is a myth, the sources are always estate agents. Everywhere in the Med is full of Russians right now including Turkey and Greece!
BTW Property sales in Spain were down again last month by 11.4%