It was more along the lines if a rhetorical questions, but glad you've seen this bit o' knowledge yourself.correct sean, its usually there or on the wrist. So yes the rifle is import marked.
What Beerhunter said...What does all that stuff on the tip of the barrel mean?
To expand a bit...It's the standard marking applied after being proof tested at the Worshipful Company of Gunmakers' (London) Proof House. As required by law in the UK on all firearms on the commercial market (in this case...post military service). Caliber, chamber length, pressure...that sort of thing. Done sometime between 1954 when the specific rules for the marks on your rifle were adopted, and 1972 when they began also applying dates (I think 1972 is the year...but don't quote me on that just yet). The Birmingham Proof House applied a date code from 1921 on....Proofed in London some time after 1954.