Albertoli
Well spotted. One of our 767's was at LTN for a while & now another one has taken its place. It's a phenomenon called 'Maintenance'. Aircraft need routine scheduled checks or minor modifications/ config. changes for lease customers. Our heavy checks are done with Monarch at their facility at, wait for it, LUTON!! There you go,Albertoli. A simple explanation as to why a GSM 767 was parked up at LTN.
It is obviously such an irritation to a feckless few that GSM is pulling through one of the darkest times in global financial history never mind just the aviation industry.