Are 12000 pound tax free enough to live in london?please the truth!

Yes

hi,
if excluding the rent it might be enough

coz i think the most expensive thing in here is rent

Yes, I'm telling the truth I live in London on £10,000. finding cheap housing is the key, try university owned accomadation with bills included or live in a shared rented house and work most days at home -therefore cutting out travel expenses.