A quick correction.
You really want to do the theory first, then the flying.
Actually in reality, you want to do them in parallel - nav in particular makes very little sense until you've done a reasonable amount of flying, but on the other hand the vast majority of training organisations require you to have passed air law before you go solo.
I think what you might find pragmatic is talk to two flying training organisations - one in France, and one in the UK, and ask if they'd be so good as to collaborate on your "special case". That way they can sort out any special legalities, work out how much you'll need to do in Britain to be able to pass a skill test here, and hopefully leave you largely free to get on with the flying.
There are plenty of friendly flying schools in the UK, and I'm sure in France, so picking the right ones will be difficult but on the whole - be driven by geography. In other words, look local to where you will/can live in both countries.
There is another option - go and do a residential course in the USA; you can generally do a PPL in 4 weeks or so intensively (especially if you've already studied the ground subjects well), for either the UK-issued European Licence, or a US licence, or both. Then go back to where you really plan to fly (HK?) and get a conversion to local flying practices. This might be the cheapest and easiest all round.
G