I never saw the mag adapter being used in all my years of British Army service - ammo came in bandoleer or box (the most common), and you just hand load the mags. Its actually very quick - it was common training drill to do this as a race - which is why UK didn't bother to adopt the charger bridge in the top cover.
Looking at the photos of the Indian Police, you can see why their surplus Enfields have no blacking left around the muzzle....