Anybody can do some Electrical work in France as long as he/she has a business registered with the tax and URSAAF (auto entrepreneur, artisan...) now, if you have a jack of all trades business but not registered as a professional Electrician (You have the knowledge but not the CAP diploma, you will not be able to give the "Garantie décennale" which will protect you and your client. Sene qua non condition for your customer to comply with his home insurance.
Garantie décennale en assurance construction - https://www.service-public.fr/particuliers/vosdroits/F2034
Anyway, referring to your statement, French do not hate English more than English hate French ;-) We do not need English to display hate. Being French, I can state that half of France hates the other half, and as my English husband says: "half of France is always ready to con the other half"!!!
My husband and I )))have been looking for an electrician for the last year, some electricians asked to be paid just to give a quote, and if they see that an English person is around, they suppose that we are full of cash. Therefore my husband has been studying the online English book "electricity in your French house" by Thomas Malcolm
www.editions-eyrolles.com and went through "l'installation électrique, 6ème Edition" GALLAUZIAUX & FEDULLO chez édition Eyrolles. He is going to do the job, but still needs a registered electrician to get this 'garantie décennale' at the end of the work. And whatever your level of knowledge or experience is in the UK, if you do not know about the French norms, I am not sure that the enic-naric can recognise your aptitudes, as the way it is done here is completely different : the English regulations, circuits... are not the same as the French ones.
Anyway, we intend to look for an English speaking registered electrician in France who can deliver this 'garantie décennale'!