Food and service on Comair is far, far superior to the BA offering in Europe. In economy there are usually the choice of 2-hot meals while in business a choice of 3.

While I haven't done LNR-MRU, the 10:40 to CPT in business the other week and there was a choice of full English, a pasta & a vegetarian curry.

As for the lounge in international departures, you maybe stuck with the BA lounge