My callsign, M7DGE, is listed on my OFCOM licence as "M#7DGE". If I operate in Scotland, I should identify on air as MM7DGE, or in Wales as MW7DGE, etc, with other identifiers for Northern Ireland, the Isle of Man, Jersey, and Guernsey. Is it possible to add these to my QRZ account as I use them, rather than using "/M"?
Sure, add them as you need them, and also consider adding a matching logbook. You may be able to add the callsigns yourself (https://www.qrz.com/manager) or, if the system won't allow it, post a request to have a callsign added here: https://forums.qrz.com/index.php?forums/add-my-call-sign-to-qrz-database-helpers-forum.121/