Re BA8751 LCY 08:35 ORY 10:55 E70 x7 on Saturdays, will the aircraft park at ORY until the return flight on Sunday?

Couldn't it comfortably get back to LCY on those timings - say 11:35/11:55? If not perhaps it'll join the increasing number of routes to STN.

Or maybe it could operate ORY/STN early Saturday afternoon and operate from STN before returning to ORY on the Sunday

What market would such timings serve?

Possibly gone under the radar is the great increase in holiday flights Cityflyer's Embraer fleet are making this summer. I reckon they did 130 such round trips last week, a combination of schedules and charters, some from unlikely starting points such as Humberside or Isle of Man. Over 30 round trips to Ibiza, the most popular point, in a week, almost as many to Palma. There's even a classic overnighter late Friday departure from LCY to Malaga that rolls back just as they reopen on Saturday morning. It's a lot more extensive than just covering the weekend LCY closure time.

Not particularly what the crews (especially cabin) signed up for, is it ? :)

I'm sure you didn't mean to disrespect anyone, but a pilot group based at LCY, of all places, is really not one to make short runway comments about.

I recall being on a CityJet 146 which surprisingly departed for LCY from Dublin from the old short northern runway 29, now closed, which I had always regarded as just for small GA. When I looked it up, it was actually longer than LCY ...

There are normally three which overnight in EDI for the 06.30, 7.05 and 7.35(FX) services to LCY. Only one is used for holiday flights - a Fri am rotation, two Saturday ones and a Sunday am. The other Sun rotation uses the plane which arrives from Zurich on Saturday morning, transfers empty to IOM for a rotation from there, and returns to EDI in the evening. So the EDI crews won't be working every w/e.