Just had a look and reckon it is the following:
S17:
Flybe - 3 weekly (2x E95 + 1x Q400)
Volotea - 4 weekly (2x 319 + 2x 717)
S16
Evelop! - 1 weekly 320
Flybe - 5 weekly Q400 (I think, not sure when the E195 started last year)
Volotea - 4 weekly 717 (2x Thomson, 2x scheduled)
So it would appear the 30% reduction is passengers corresponds nicely with a 30% reduction in flights!