STN is growing brilliantly, and for a LF of 92% in June, then surely somebody is looking at LDY and thinking that perhaps there is further demand there for more LON routes.
What confuses me is the face that FR had double daily on sale from the winter schedule but removed them again. So obviously it was planned to go double daily, so what changed their mind? With a LF of 92% demand is definetely there and as you say Cuthere also for another carrier to start another London route. I'd imagine if BE start LGW then FR will almost certainly go double daily on STN.
I see PIK is still in the 50-60% margin which isn't great but FR must be content as it's daily for winter, should they not cut it down to 4/5 weekly and put BHX daily?