Here is some interesting trivia for you regarding the weight of the aircraft, it was well over its landing weight when it returned back to LHR
TOW 146300 (max 158000)
landing weight should have been in LCA 125700 (max 136000)
however as the plane had only been in the air about 20 mins it is fair to say the landing weight back to LHR was nearly the same as the original take off weight so say about 143000 os well over max landing weight of 136000
Very interesting and well landed!