Thanks for the advice. I will order a pair of sling loops as soon as the wife has recovered from the shock of my new Christmas present.
The top one is 1945 vintage, all matching and is in what I can only describe as "nearly new" condition. The bottom rifle is 1944 but the mount, although genuine doesn't match. This was imported from the US last year. It has clearly been well used but still shoots really well. Both scopes are mk1's and I would guess, not the originals. The plan is to use the newer of the two as much as possible and save the older for special occasions. It will have it's first outing with me this weekend.