Key evidence is a scope serial number on wrist of butt, ... or not.
By the time the BSA Shirley "M47C" mark was in use (1944) the
British markings were pretty standardized. A 1944-1945 British made rifle with pads and cheekrest but with no T mark almost certainly indicated that it was a No.4 Mk.I (T. LESS TELESCOPE). This means that for some reason the conversion process on that rifle was halted partway through the process.
If it is a late one e.g. Serial number X3xxxx, it would likely be end of war ... stop conversions. If it is earlier like 1943, then that would likely be a reject.
It is a very tricky area.