MSM:
as per BRd 3(1) NAVAL PERSONNEL MANAGEMENT
Chapter 44 effect June 2017
4425. Meritorious Service Medal (MSM)
a. The MSM can be awarded to not more than 201 candidates from the Regular
Forces in each calendar year. The award quota is RN/RM not more than 52, Army not
more than 89, and RAF not more than 60 per calendar year. There are no clasps to
this award.
Apparently the RAF recommendation process is under review