The operating period is very short, just 2 months or so! It is fair to say that they are testing the water for now. However I do wonder if in the future TCX would consider using STN to operate the 'trunk' long haul routes which have lots of competition from LGW (MCO, CUN, LAS being prime examples) and operating the less busy primarily Caribbean routes from LGW with its larger catchment, assuming they want to have any long haul presence at all there.