I think as GJ says the exodus began a few years ago. A Spanish shopkeeper in Coín told me a few years ago that the British were leaving in droves. Used to be like little Britain there!
I think British who will now buy in Spain will be mainly well-heeled retirees as used to be the case. With the unemployment rate in Andalucía standing at 27.1% and expected to continue to rise not many opportunities to earn a decent income.