Is that the best number 10 can do in Housing White Paper in briefing in Housing White Paper – burying station car parks and building housing above. Something which will have been done already where it is economic and has only been done or planned in a handful of cases like Northampton. Its contribution will be tiny.
Most rural stations (the vast majority) were never designed with car parks and they are squeezed in
A few were built on former coal yards, however many coal yards remain undeveloped and have potential – as here in Pluckley Kent
However the BRPB – or whatever they are called now – already has a list of such sites and surplus car parks available for development and now it has shrunk over 20 years to very short nit pickings indeed. I know because a developer paid me to go over it every week. A few prize sites were held back as strategic so they could be studied for the potential for redevelopment (including burying car parks (where of course you lose 25% of capacity because of pillars and cant do in areas with high ground water). So the potential nationally is small, this is a local issue for high value areas not a national solution to make up for treating the Green Belt or Green Fields as Inviolate. Its a distraction and a rather silly one.