There was 5 regional editions announced in 2017 which includes DRS (North of England/Scotland), Anglia (East Midlands/East Anglia/South Yorkshire), Intercity Mainline (West Midlands/Wales), Colas (South East/London/ Home Counties) Class 47s & VDA van (South West).
So far there has been only 2 regional editions for 2018 announced which includes City of Truro 47625 (South West) and Sir Daniel Gooch 47628 (West Midlands/Wales). Which means that there are 3 (North of England/Scotland, East Midlands/East Anglia/South Yorkshire & South East/London/Home Counties) regional editions yet to be announced.
Samuel.
Edited: More Places to each edition.