Just to confirm;
LBA & BLK are complete self handling
MAN & NCL are front of house self handling
PMI, AGP, MJV, ALC & FAO are all self handling. Whilst overheads may be slightly higher with self handling vs contracted handling, efficiency and revenue control is greatly increased. A lot of the self handling stations in Spain previously did not have revenue agreements with Jet2, so employing their own staff meant overheads were increase by around 10% but major ancillary revenue incomes are now made, more than offsetting the increase in cost.
As for LPL, don't think it's gonna happen. It would be too close to home for MAN/BLK. The only way I could see it happening is if a couple of 757's are put in to operate holiday routes for Thomson/Thomas Cook but I really doubt it will ever happen.