Hi All - I've tried to search (standby) for the answer but didn't find what I was looking for and am looking for some expert advice. I'm traveling BOS-LHR-CDG (AA Business to BA Club Europe) in a few weeks thanks to AA's recent premium cabin fare sale, I purchased a discounted business class fare (listed as "I" for the AA and BA segments). When I originally booked the tickets I was looking forward to experiencing T5 and the BA lounges and had a 4.5 hour layover, but am now getting a bad time from the family that will already be in CDG. There is an earlier flight and I'm hoping to get on it (move from 2:50 pm to 1:40 pm flight, I arrive at 10:35 am on AA). I plan to carry on my luggage and am a AA Platinum (OW Sapphire). Any thoughts on the feasibility of accomplishing this or best way to achieve it?

Appreciate your advice!