Hello

I am looking at an Avios redemption from MAN to HND. That involves 3 flights:

Business Class from MAN to LHR, operated by BA
Business Class from LHR to CDG, operated by BA
First Class from CDG to HND, operated by Japan Airlines.

Booking code is U for the BA flights, and A for the Japan Airlines flight.

Do I get access to first class lounges in MAN and LHR, as a flyer with no status from the above?

And for that matter, which lounge(s) can I access at CDG?

Many thanks