Cheap places to eat out in London

Zeret Kitchen in Camberwell for Eritrean/Ethiopian food
Mandalay on the Edgware Road for Burmese food
Silk Road in Camberwell for Chinese food

all are very unfancy looking, but the food is incredible and both food and drinks are very cheap - you can have a great meal for under £10 a head

I've cycled past Zeret every day for yonks and wondered whether they're any good - will now have to check them out!