Having lived through Gulf Wars I & II, BA maintained service to Bahrain throughout all bar about 2-3 days. As a result of what happened in KWI in 1990, in 2003 crew slipped in LCA and flights down to the Gulf were done as a return trip with a new crew. Aircraft took a very southerly route down the Red Sea and then across Saudi. A lot more fuel used yes, but nothing really to worry about.