No.
Firstly because BACS and CHAPS are not the same thing! A BACS form will be no use!
If you want to do a CHAPS, normally you have to present proof of ID, a signed CHAPS payment form and present it in person to your branch (well, I work in CHAPS payments and that's the way it's done here.)
Secondly it has to be done and the instruction placed with your bank by no later than 2pm. The CHAPS cut-off for payment is 3:50, so 2pm is imposed to allow the banks to go through the security and anti-money laundering checks etc and still have time to do the actual payment.
I would recommend you call your bank and ask their advice. Explain you're not in the UK and see what they say. Unless the branch in France is a branch of the same bank, they're not likely to help due to anti-money laundering requirements.