An interesting point. Theory says that Links had/has a B type operating licence therefore they could only charter in up to 20 seat aircraft. Therefore Dragon fly or any size aircraft below 20 seats is acceptable. Back in Air Wales days we would bring in 2 x Piper Navajo to replace the 228. In fact Haverfordwest Air Charter where known as our fourth emergency service! Once the licence had changed to an A type then in theory you can charter in any size aircraft but an A380 to do a Cardiff Newcastle may have been a bit excessive.