Can somebody explain why an aircraft returns to LHR causing further disruption to both the airports and airlines operations. Given that there are other suitable 'quieter' airports to divert to LTN,STN,MSE for example where the impact of the arrival would not cause such upheaval. I appreciate that the passenger and crews safety is of paramount importance but was wondering if there is a procedural input into a diversion of this type as to where to land.
Thanks in advance
This question in no way detracts from the excellent airmanship involved in this specific incident, my question is of a general nature.