This is causing increasing difficulty as many travellers cram laptops, palmtops, iPods and mobile phones into their hand luggage.
So it is the passengers fault for complying with the instructions issued by security staff, i.e. all electronic items should be placed in your hand luggage!
Security is becoming ridiculous at airports, and not just in the UK. I recently had the misfortune to pass through CDG, 400 pax trying to pass through a single security post! Do security departments not realise how many pax large aircraft can carry, or do they think it is just a good idea to take lunch/coffee breaks at the same time as all the pax are trying to get to the departure lounge?