BAladdy, I think that GS is on and off on IOM-LCY as well as various other routes on the Arann network (mostly domestic Irish) standing in for tech ATRs as and when they happen. I'm aware that Cityjet are using a 328 for LCY-DND and also some EDI movements at the moment, that arrangement is due to cease by the end of October.
Sorry not to be more specific, but that's my sixpence worth.