Hey George, there's a TON of food around there, absolutely spoilt for choice! The thing about street photography is,.. wherever I am, from Brick Lane to Piccadilly Circus, I find myself getting very hungry because there's always delicious aromas of food wafting about!
I always pack a sandwich and biscuits before leaving home but still sometimes end up buying some food along my walk. You'll enjoy Brick Lane a lot. Just like garry mentioned, it's choc bloc with things to photography. And you'll possibly never before have seen so much graffiti and incredible wall art in your life, it's amazing. Maybe garry knows of other loos in that area? The Box Park building is not far George, about a 6 minute walk from Brick Lane. It's near Shoreditch High Street station and I think it was in Bethnal Green Road. Most of my destinations are reasonably close to tube stations that have public toilets and I know that Euston, Waterloo, Kings Cross, Charing Cross, and a few other major stations have those thank goodness! By the way, anyone going to Trafalgar Square, the main part was closed off on Saturday while they were setting up for a St Patricks Day event today which might possibly be on tomorrow too. I was only able to walk around the perimeter of the square and the top part where the white wall is under the national gallery.