A very nice and well-travelled No5 Mk 1. Fazakerly rifle manufactured in November of 1944. The little arrows are the "broad arrow" military ownership marks. The various others are simply proof and inspection stamps. The butt-disc is a first, as those were never applied to No 5's. That certainly did not happen in UKservice. Perhaps it was added by some foreign government or even some time during its civilian life.
ROF (F)= Royal Ordnance Factory, Fazakerly. 11/44= November 1944, followed by serial number.
I would advise you purchase any of Ian Skennertons "enfield" books. He has lists of proof and inspection markings in the glossary. Skip Strattons' little paperbacks on enfield collecting list quit a few as well.
This is a thead that comes up often, re; markings. They are illustrated in the books mentioned above. To go through all the little would stamps would cause headaches and eye strain!
Oh, and welcome to the forum. You have now been infected with "enfielditis." There is an inverse relationship to the number of enfields one owns and the dwindling dollars in ones bank account.