In message
,
martin writes

Any other stations which have a bit of land that could be put to such
good use?

Well, it's already been done, but the Gunnersbury Triangle (opposite
Chiswick Park Station) is a wonderful nature reserve, occupying former
railway land. Well worth a visit in better weather:

http://www.chiswickw4.com/default.as...sburytriangle/

--
Paul Terry