We had about an hour between flights at Doha (RGN-DOH-LHR). On arrival we spent many minutes cruising round the edge of the airport in a transfer bus eventually got to the transfer gate the fast transfer lanes were closed but no queue at all at normal-speed lanes so no problem. Arrived at departure gate as it was due to open admired once again the confusing way a flight disappears from the gates display screen list as soon as the gate is opened. Our flight was delayed so we hung around for half an hour. They don't make announcements about delays over the PA because it is a 'quiet airport' (no-one told the lady who was using the PA to tell us not to smoke). Suddenly the gate was open we moved forward but great efforts were made to persuade us to sit down again to avoid an unsightly queue but we resolutely kept standing and submitted ourselves to the first of 3 back to back ID checks. Got to the gate itself (check number two) and down an escalator to a tatty ground floor area waiting for access to the transit bus two of which were parked by the doors. The escalator continued to bring more and more people down from upstairs. Still no exit was allowed to the bus. A man struggled through the crowd with a key. It didn't fit the door lock. The escalator had been turned off by now to stop people tripping over each other at the bottom. The man tried the other door. An ironic cheer went up as the door opened. Time for our third ID check and on to the bus which then didn't leave for a few minutes even though it was obvious more the one bus would be needed. We set off on another extended tour of the airport perimeter and arrived at the foot of the aircraft's steps. Naturally only the rear door was available to us Economy class passengers so boarding was slow. All in all not a brilliant experience. Hope the new terminal opens soon and is better than the current one.