Maybe you should go to the local council and ask for the numbers of foreign speaking people in London, and find out what the most popular language is 2nd to english? I would also concider learning basic sign language as I find knowing the basics myself, that the deaf appreciate your trying and can grasp what your trying to say. I learnt basic sign language due to the fact my town has the only live in deaf college and school in the country. Liz + Bump, 19 weeks and 6 days ( Not long to go now!)