I'm with Truxta- or at least what I think he's trying to say. My thought process/sales pitch to the council would be we the community need space to do x which is important because y. And we have an iconic, historically significant building here, that would be fantastic, be saved by this project and add value in these ways.
Instead, it sounds a bit like the cart came before the horse- "this is an iconic, historically significant building so give it to the community and we'll invent some 'community stuff' to go in it. We can't have the building? Stuff it then"
If there is a genuine need for a community space (and I happen to think there is)that need still exists even if Brady's isn't an option. Which doesn't mean flats/pricy restaurants are desirable for that site, or that Lambeth hasn't behaved badly- simply that the community space dream should live on, and be looking for some other space in central Brixton. (Even while regretting that its not Brady's)