suzied I think London is the sixth largest French town for population (at the moment).
Christine apart from some catastrophic event I can't see Le Pen winning. All the other candidates have gone for Macron apart from Mélanchon who told his voters to follow their consciences.
What was interesting around us was the variation in all the tiny villages. Our village went for Fillon and the ones around us chose Macron, Le Pen and Mélanchon. The département went for Macron though.
So a centrist, pro EU, pro business president looks likely.