Re Northeast...I'm pretty sure than when the Viscounts were doing the Leeds-Liverpool-Belfast Aldergrove service in the 1970's the callsign 'Norjet' was used. When the yellow/grey/white colour scheme was introduced the aircraft were nicknamed 'banana boats' but this might have been a scouse thing! Personally I always liked that colour scheme, which was also applied to Cambrian but substituting a magenta like colour for the yellow.
Spiney.