Lounge access, as suggested by SheBangsTheDrums, was fine. So all in all not a bad experience but I'll try to book direct with AF in the future to avoid check-in / seating issues.
Glad you got your access and upgrade ^
As far as booking direct with AF goes.....it will make no difference to the check-in process. My bookings have all been direct with AF, but you are still diverted to the on-line check-in for FlyBe........where its not possible to check-in