Being valued at £2M doesn't mean you could sell all of them for that price or that the people living in them paid £2M for them.
The sort of person who could afford a nice house 3+ decades ago and spent the intervening years living in London isn't likely to move to somewhere more rural just because they can realise an investment.
The sort of person who could afford a nice house 3+ decades ago and spent the intervening years living in London isn't likely to move to somewhere more rural just because they can realise an investment.