Re: I's the overal experience....
I couldn't agree more that adding a third runway to Heathrow is madness. Where will all the extra flights go when the runways are closed due to inclement weather or an "operational issue"? Bah!
The security scenario you describe is akin to Dalaman airport in Turkey. You rock up and everything is X-Ray scanned at the front entrance before you check in. After check in you go through security and more x-ray checks. After that there were further hand searches before being allow to the departure gate to check for contraband - lithium-ion batteries / power packs / tablet PCs etc.. etc.. Three checks for one flight!