You do not have the slightest clue about this lot. There is noone going to demolish anything here. The area out of the cost line is 2 km Noth.
This houses were here before there was even a road in the coast. The only bus there was had to go on the beach itself.
It's true people have not respected much the law (that came in place in the 1967, 20 years after this houses were built) The issue have not been this houses, the issue has been in benidorm and similar places where all the foreigners were coming.
I can give you ideas of why noone would like to have a house in the beach in UK, bit I am sure you know them already. It explains why instead of doing that british come to spain to buy those ilegal houses.