...and what different bits of it are like and how expensive etc.
They've posted in the property forum in a very well-behaved fashion, but that doesn't get much traffic. Personally I think they could reasonably have asked here since it's about a bit more than just property.
So at risk of a telling off, please go over there and help them out! I've said what I can, but SE16 is mostly what I know, from an actually living there perspective.