You have to go back to the days of Cambrian Air Services to find Guernsey to Cardiff operating profitably; & that was as part of the Cardiff-Jersey route. Since then, the route has operated intermittently & limped along, financially. I think that, overall, it only supports an a/c of DC3 size (which was why it was successful with Cambrian). Even with an AT42 it probably cannot be run daily - or year round. The financial situation at Blue Island does not appear to be that rosy; so I have to agree with Rivet Joint that the airline should concentrate on their main cash generators ie Guernsey to Southampton & Jersey, & Jersey to Southampton. It is certainly true that they are short of a/c, & those that they have are very old. I would not be surprised to see the airline disappear if it cannot operate inter island & C.I.- Southampton flights profitably. Word is that the Jersey - London City flights are not doing that well, either.