Blackpool has a very mixed and random rotation of both the ATR42 and ATR72. It usually works out at about 4x ATR42 and 3x ATR72 weekly but as I say it is quite random.
I must say I am surprised RE has not been interested in the DSA route especially. However, when you look at the bookings for the BLK service, quite a high load comes from Dublin on Fridays, Sundays and Mondays - couldn't think why!
I somehow don't think Doncaster would have the same appeal...