Low budget trip

Me too. There's a Tesco Metro (or Express) close to the Natural History Museum that will sell you a lot more than that, with a can of good beer too and change left over.

@#11: Are you stating that Hackney is in one of London's most interesting areas, or am I misreading what you've written?

Here is one of my most up and coming interesting and very cultural stars of today's East End..
On a budget too:

http://m.youtube.com/watch?v=ETSl8gWsFZ0