I couldn’t find the definitive answer on the RSGB website, nor the email address for queries regarding the MR/GR special prefixes. So I emailed my RSGB Region Manager, Kath Wilson M1CNY. She has just replied to confirm that the ‘R’ calls may be used away from the main station address, including /M and /P.
No need to edit my alerts then… 
Tom M1EYP
In reply to M1EYP:
Thanks Tom - a good result.
73
Roy GR4SSH / GR7ROY/ 2R0OOO / GR0OOO / GR7OOO
In reply to 2E0YYY:
It was bad enough operating MM6MMM/M during my visit to Scotland
last year, Ian.I’ve been told, it’s a nightmare on the key
Almost as bad as EI5HS !
73 de GR3NYY / MR0ADJ
Walt
In reply to G3NYY:
Trivial on a paddle.
Dash hold, dash hold, dash hold, dot, dash hold, dash hold, dash hold, dash, dot hold, dash & dot together, dash hold.
Why you’d want such a call beats me. The other station will have worked 3 stations whilst you’re still sending and have still to reach the / character.
Andy
MM0FMF
I’m sure that the callsign 2E0YYY is more of a nightmare on the morse key than M6MMM and MM6MMM.
Jimmy M3EYP
Oi! I thought you said you couldn’t/wouldn’t do morse?
Dad 
I have submitted my Application, but can we use the ‘R’ call on 60m or does the 60m Nov effectively prohibit that ?
(Now where did I put my 60m Nov)
If anyone needs any of RSGB produced Golden Jubilee QSL Cards just let me know and I can send you some !
Stewart G0LGS
In reply to G0LGS:
Hi Stewart,
I assume it should be OK to use the ‘R’ call on 60m, as it was OK to use the ‘A’ homecoming Scotland call in 2009.
73,
Mark G0VOF
In reply to G0LGS:
I have submitted my Application, but can we use the ‘R’ call on 60m or
does the 60m Nov effectively prohibit that ?
I can see nothing in the 5MHz NoV that would prohibit it. It merely adds some clauses to the main body and some frequencies to the schedule, but doesn’t change the identification requirements. So unless the “R” NoV says otherwise, I would take it to apply to the licence as already varied by the 5MHz NoV. The important point is that the licence has been “varied”, it is not a separate licence.
However we won’t know for sure until we see the actual wording of the new NoV.
In reply to G4SSH:
The problems will be with the QSL Bureau who will not know which
regional sub-manager to send a GR card to.
I’m also wondering whether the ARRL will be prepared to issue more than one certificate for the same callsign for LoTW. A certificate has the DXCC entity bound into it. It’s quite likely that I would need one for both England and Wales.
Hi All
PS how on earth do I pronounce “Mynydd Enlli” ???
73,
M(M)0ZZO (from very close to Arthurs Seat but without a radio)
I hope Arthur doesn’t mind! 
Mynydd Enlli = Mun-uth en-hlee approximately.
73
Brian G8ADD
In reply to G8ADD:
In reply to GW7AAV:
There’s a good science museum in Brum, Steve, and it’s probably
closer.Brian G8ADD
There is the Museum of Science and Industry in Manchester which has the benefit of having custody of the beautiful “Dougal”.
In reply to M0ZZO:
There’s no alert recorded for your proposed activation? As already stated, if you’re going on HF then these novel prefixes can attract significant interest. Probably less so in the UK where everyone will bored with them after a few minutes.
Andy
MM0FMF
In reply to M0ZZO:
“PS how on earth do I pronounce “Mynydd Enlli” ???”
Bardsey Island.
In reply to G1INK:
You are wrong Steve. “Bardsey Island” is the English for Ynys Enlli. So I guess the English translation of Mynydd Enlli is Bardsey Mountain.
In any case, James asked for the pronunciation - which is “Minnith Enchlee” (with the ch like a German ch, or indeed a Welsh ll).
Tom M1EYP
In reply to M0ZZO:
PS how on earth do I pronounce “Mynydd Enlli” ???
Approximately, “MUnUth EnHLi”, where the ‘U’ represents the ‘schwa’ sound, as in the second vowel of ‘open’, ‘hammer’ and ‘over’, ‘H’ represents an h pronounced with the middle front of your tongue firmly against the roof of your mouth just behind your teeth and the L is quite a “liquid” L.
I think. (Some vowels in Welsh can be confusing - y is one of them.)
If you really want a definitive answer, I know some people who speak Welsh, and I may be able to get guidance.
Ian
I almost learned how to speak Welsh completely just by avidly chasing MW0IDX’s SOTA activations in 2003!
Tom M1EYP
In reply to M1EYP:
I almost learned how to speak Welsh completely just by avidly chasing
MW0IDX’s SOTA activations in 2003!
I heard at least one SOTA conversation in Welsh on the air today. 
73, Rick M0LEP
In reply to G6ENU:
PS how on earth do I pronounce “Mynydd Enlli” ??
With apologies for non-MPFC fans:
Specialist: “Ah! Mr Luxury Yacht. Do sit down, please.”
Mr Luxury Yacht: “No, no. My name is spelt ‘Luxury Yacht’ but it’s pronounced ‘Throatwarbler Mangrove’.”
Andy
MM0FMF
In reply to MM0FMF:
There’s no alert recorded for your proposed activation?
Myself and a friend have rented a cottage on bardsey for a week. We are having a planning evening on Monday and will post alerts after that.
Thanks to all for the pronunciation tips.
73,
James M0ZZO