EI-BUD
The problem is that Manx Airlines charged fares that were considered reasonable or, in the case of farecracker offerings, even cheap back in the day. Exampes have been quoted in this thread. Nowadays, the same fares, adjusted for inflation, would be considered by many as outrageously expensive. Thanks to the LCC boom, there is an expectation that pretty much any airline can (must) haul you around for 100 GBP or less. With such fares, Manx Airlines would not have lasted a year.