Given that Easyjet has such a tiny presence in the Midlands, and they wouldn't bother pitting bmibaby against Easyjet at Southend because they would be subsidising both airlines, I suspect any such move would not be founded on the idea of both airlines competing in any way. They may want bmibaby for Carlisle - I doubt that Easyjet has any interest in that airport unless there are significant subsidies (ie. more than Southend - at least SEN has decent catchment and a direct trainline to Liverpool Street), which would probably make such an operation unviable for Stobart anyway.