It all depends on which side of the block you are.
If you are facing towards Crystal Palace you will get good reception with a decent indoor aerial. If not there's little hope.

I used to live in Forest Croft and the problem is the same. However we were able to put roof aerials up which solved the problem, although Sky Dishes weren't allowed. We also had the entire block wired up for cable, for free, when it came to the area, but I believe the management of Taymount Grange wouldn't allow it.