Why don't flyBE run some useful routes from SEN, where there is an under-used terminal and a clear demand for flights to Belfast and Edinburgh demonstrated by EZY, and no direct competition, rather than try to get in to the LCY market which is hotly contested on some of their chosen routes? Paris, Brussels and Copenhagen would also work from SEN, I believe.
Before anyone mentions yield - I know. No reason why such routes shouldn't be profitable from SEN though, and a safer bet I'd have thought.