A couple of months ago flying from T1 BHX I was informed post xray that my trusty zip-lock bag was 'larger than the DFT guidelines. The security guy seemed almost embarrassed but apologetically told me that they had been audited by the DFT and pulled up on this recently. He then proceeded to give me two 'acceptable' bags for me to decant my toileteries into. Having done so I walked all of 5 yards before putting them back into the original bag and proceeding airside to get my flight.....