Do you Speak English

I had an amusing experience last year after I had left a small village in the south of France I drove on to the next town stopped and he asked me for a lift as soon as he had got into the car I said good morning to him in French and he replied in the same language Apart from a few words I do not now any French at all neither of us spoke during the journey I had nearly reached the town when the young man suddenly said very slowly do you speak English ? as I soon learn he was English him self