When I fly (Ryanair) from London (Stansted or Luton) I realized one strange thing, that never happens when I take off from other airports:
Usually B738s take off, than climb and after 10 or 11 mins you are at FL 370. When you depart form London, a few minutes after takeoff the airplane stops climbing and the engine power is reduced. After about 10 minutes low altitude low speed, climbing restarts, pilots give full thrust to engines and then you rech your final FL.
Is this a standard procedure for London flights?