I don't know about their other operating stations, but at Norwich the intentions are to upgrade as follows:
NWI - ABZ : from EMB135 to EMB145 (4 times a day)
NWI - EDI: Already operated by a JS41 - 3 times a day, (unfortunately an itinerant tug bumped into it recently and there have been 2 JS32's replacing it three times a day).
NWI - MAN: from JS32 to JS41 - 3 times a day.
Eastern will also be operating some of the Sat/Sun summer charter services to EGJJ/EGJB using the EMB145.