Jet2 Is 17 aircraft aircraft (but noteworthy that they have an A330 as well as switching all B737-300 to B737-800), Ryanair will have 9 most of the summer but 10 in August, so, an increase of 1 across the board (was 8 summer 9 peak last year).
Thanks for the update- I thought Jet2 was expected to go up to 17 so was surprised if it was going to remain at 15.