Not so easy from SOU as an aircraft has to position in to operate as no jet available, Flybe fully committed in the summer on there E jet , so therefore a cost implication to start with
I know a TUI B738 will have to position in to operate from BOH as there based aircraft is operational that day , but there is BOH based cabin crew to operate it
Also the same old story is , early departure and late arrival back to SOU and no guarantee of the night arrival being on time
Tranun , Santa holidays and Canterbury travel being the latest examples of this with day trips to Lapland being moved to BOH