My DS is in his final year at The Garden School in Hackney. Unfortunately it still has no sixth form provision although we very much hoped when he started there in Year 7 that sixth form provision would come onstream in time for him.
The alternatives seem to be The Bridge School in Holloway, Phoenix School in Bow, or Bridge ILS (for very high needs students) in Islington.
Does anyone have any information on private schools which might have sixth form provision - preferably in East or North London? I've had a look on google but that didn't seem to throw up much.