Senorbob,
Mixed fleet get an hourly rate which is designed to pay for breakfast.
BA Gatwick crew have negotiated a breakfast allowance on top of their hourly rate for some destinations but not all.
BA WW and E/F get paid allowances which are triggered as they pass a window for a meal while away or on the aircraft but they don't get an hourly rate.
You can't really compare them all because they are all completely different agreements.