At that time the person who compiled the Manchester movements record also supplied the same details to the editor of the (then) paper based NWAN magazine. However neither magazine featured the aircraft used by the regular British airlines (which included Aer Lingus) - not featuring their aircraft as they were so commonly seen.
In the summer season Manchester 'Flightcheck' timetable for May 1996, on weekdays the Dublin-Manchester service was operated on a Saturday, arriving Manchester at 08:35 using BAe.146s. While the EI 217 on a Sunday does indeed fit a BAe.146 flight, leaving Manchester at 17:55 local. There were a few other flights across the weekend, using Fokker 50s.
There is a slight irony here, as in 1995 NWAN did record the registration of every Dublin-Liverpool service by Ryanair (Aer Lingus did not operate the route at that time)!
Viscount .... Well that is just taking the biscuit!