An LDY-SEN service can only be the transfer of existing Loganair from STN to SEN, unless someone is getting expansive enough to start a competing London route from CoDA without any Government support (which would then negate the need for the existing PSO service!)? The idea of a Public Service Obligation is to obligate an airline through public support to maintain a single air service on a critical trunk corridor where it would not otherwise exist. Not to throw public money at a series of parallel routes, ensuring that all of them become undermined and unviable.