Couple of gap fillers...
Systime at Leeds Bradford C421 G-EAGL and Kenton Utilities at Newcastle Beech Kingair G-BHYU
The Vernair fleet in the late 70s was..
G-VRES Kingair 200
G-BAVE Kingair A100
G-BFVX Kingair C90
G-BFVY Kingair C90
G-AVNG Queenair A80
G-AYPC Queenair 70 (my daily driver)
G-WWS Skyvan
G-AWPK PA-23 Aztec