Used to check them in at LHR bout 5-6 years ago!!!
Ashgabat - LHR - Ashgabat used to ops on B757
Mainly ran on time from what i can remember, and upon putting the jetty on most pax had their shoes off and dude...... what a bad smell.............thats all i can remember really!
Wasnt as bad as Biman Bangladesh though ............ you should be ok, will be different to BA though.........enjoy