TCX at different times during the year use the aircraft in Glasgow during the Scottish Peak holidays.
The past few weeks the aircraft positioned to GLA, operated the outbound flight then came direct back to CWL with pax on board, and vice versa later on - operated out of with CWL pax then back to GLA with pax and pos back to CWL. This may have something to do with the low load factor on your flight, as it may be only bringing a weeks worth of pax back once it started back up again.