I hear that they could be up to 8x more Boeing 737-800's joining the Jet2 fleet over the next 6 to 18 months.
For starters 2x aircraft will replace the leased Boeing 757-200 which are returning to US airline Allegiant Air at the end of the summer season.
It looks 2x are now destined for the Leeds base next summer while I suspect another will replace the Manchester based leased Strategic, Airbus A320.
As to what or where the other aircraft go is anyone's guess.