have been swabbed many times. never got anything other than a wave thru. wife had a very thorough search of her carry on at lhr terminal 4 in oct. everything out swabs, the bag run thru the xray again, on and on. i asked if there were any questions that we could answer that might help. they finally said that it was a random search. we had enough time for me to have 3 jw blacks @ the ba club be fore getting on lhr-cpt in coach. narrowly escaped a divorce. ba isn't very comfy in y.