i would imagine it will still be operated by BRS/CWL crews, as FCA do not base an a/c at EXT in the summer (at the moment...). If you work for First Choice surely you shud have more information than me anyway
Generally the crews don't night stop, they get a bus down before the flight, then fly it, then go home, but most of the flights will prob depart around 6-8am so will be many early starts!