Having worked at a cargo handling company at LHR in the past and been amazed at the lack of training that related what the job entailed to the effect on loading . As time progressed in the job seeing the difference between the old timers who understood both the commercial reality of the handling company and the practicle contibution to safety through check weighing all freight over 25kg to pallet/uld check weights, and the complete lack on understanding from new staff because this link had not been highlighted in training. Most of the new people thought check weighing on reciept was to check that the cargo agent had not under declared to pay a lower rate!!
Incidently the "old timers" refers to when the handling company was part of a large european airline and therefore training was much broader so even a wharehouse man understood his part in making sure that aircraft got airborne safely.
So if the airway bill said 53,000kgs, the check weight before loading on pallets should have identified this, so that the airline had correct weight figure and not being under paid!