We have also decided to change from the existing three phase to mono phase. I thought I could get away with this job as EDF have a really good English speaking section. Andrew made the initial call and all seemed well until I heard him say that his French wasn't up to much but it was no problem as his wife was much better. After the call was finished I asked him what this was about. It turns out that I will be taking a telephone call next Friday morning answering technical questions that I'm not sure I could do in English let alone French!
Next will be choosing the fittings. More marital negotiations!