I was not on the Rock during the day in question. Certainly everyone who I have spoken to remarked that the aircraft was over the town/houses at a low altitude - and very noisy - they should know having been here and lived with normal aircraft practices - including missed approached/go arounds.
Anyway maybe Monarch will not be flying to the Rock after November as they are under going some form of review (probably heaved off with the increase in landing fees as well) . Certainly the carriers web site is not accepting bookings beyond November which is unusual on this route.
Maybe Easy Jet can fill the void.
Nivsy