I never rode on it but my Unlce and Aunt in Surrey lived under the flight path and cursed it roundly. As I watched (and heard) it rattle overhead, I did not say that I would loved to have been on it! I believe 'Gatlink' came from the registration. I understood that BAA thought the M25 motorway would take all the paxs and did not reapply for the license. By the time it was clear that the M25 couldn't - there was opposition to reopening the route. I sit to be corrected and haven't got time to read the linked articles at the moment.
I think it was restricted to VFR only? How many rotations did it do each day?