The ex-GB passengers really shouldn't be on 319 flights unless they've changed their bookings as all GB flights are now being operated with exactly the same schedule by ex-GB aircraft. All AGP/ALC (including the original scheduled easyJet flights) are going from the North Terminal.
Maybe I'm just used to the passengers but mine have all been fine since the changeover.
Curious to see that recruitment has stopped for LGW - I wonder how long that will last? Though there are two courses in Jubilee House for the 320 fleet and no doubt plenty on the way from Luton for the 319 fleet. And with this planned reduction in crew numbers goodness knows what will be going on this year.