I think the developers will make themselves extremely unpopular to even suggest building on existing green space ie Leathermarket Gardens. We'll be looking at what extra green space they're going to be delivering to the community to service their thousands of new residents.
That shaded blue area covers the warehouse that Shunt want to move into, the council block with the newsagents and chinese take-away which has recently had major roof work, the wonderfully shaped old warehouse between Snowsfields and Vinegar Yard and the (rubbish) new-build with the curved front by Hardwidge Street. Are they all to go?
also looking at the link MiltonF sent it looks like there's plenty of public open space around them, so negates the idea of building over leathermarket Gardens which realy was never on anyway...think that was more scaremongering than anything.