CDG
CDG seems to have been feast or near famine at BRS for a number of years.
Looking first at Air France, back in the early 90s Brit Air operated F 28s in competition with Brymon Dash 8-300s for year or two before leaving the field clear for Brymon by now operating with BA livery and call signs.
In the early 'noughties' Air France Regional returned with small ERJ jets at 3 x daily against BACx ERJs also 3 x daily. That lasted until 2004 when AF pulled out.
BACx later morphing into BACon increased to up to 5 x daily until the news broke that Flybe would be taking over BACon and that the BRS base would close with the loss of most of the routes, including CDG.
For a while it looked as though BRS would have no CDG route at all in summer 2007 until easyJet stepped in for the first time on the route with a daily flight. That winter Air France commenced a 3 x daily service with Airlinair ATR 42s, later upgraded to 72s, against easyJet with summer 2008 seeing easyJet timetabled at twice daily (although I'm not sure all the flights actually operated) and AF continuing at 3 x daily (fewer at weekends with both airlines).
Gradually easyJet reduced its rotations to daily and within a couple of years AF had downsized to ATR 42s again.
In recent mid-winters easyJet has operated less than daily (4 x weekly in January this winter for example) and of course AF reduced to 6 x weekly in the summer just passed and is now daily, albeit with 80-100 seat aircraft.
So the history of the route makes it difficult to even guess what might happen in the near future.
Aer Lingus Regional
CDG might be shrinking at BRS but Ireland is growing.
After the recent announcement of the re-commencement of BRS-SNN from next summer, the airline announced today that BRS-ORK would go from daily to double daily, again from next summer.