Minicrinkle, yes it is, more specifically the flat land adjacent to the tracks. It even has its own road access, currently blocked. If you are serious about this then please do send me a PM. May be able to assist.
Tennybelle, I do not have an issue with siting a market on Blythe Hills, any site you choose will be better for some than others, though for us would probably not get our business as Horniman is closer and dare I say it better location for this. I don't think that the old Nursery would be too close to the Horniman - if FH wanted to set up a market outside the pools that would be even closer but am sure would fly if well run.
More importantly, the old nursery site could benefit the local businesses - cf my post here http://www.se23.com/forum/showthread.php...1#pid58441. It would require cooperation from Southwark though which is far from a given.