Tom long haul at BHX.
Birmingham Thomson crews are trained and do fly long haul on the 767 from bhx. The way it works is generally the bhx crews operate the outbound sector to where ever and operate the return sector to another uk airport, stay in a hotel and travel back later that night. Conversely , a Manchester crew for example , operate the outbound from Man to xyz and then fly the return sector to BHX, stay in the hotel and travel back to Man later that night. This is common practice in Thomson for long haul, with other permutations ,as is positioning aircraft around the country.
If the South West is missing out on Thomson long haul, I would say it is purely down to yield. Some 767 s are staying in the fleet until 2018, so they will need to find work for them .