There were (T) variants of other British rifles during this time, but the No4 Mk1 was the preeminent sniper rifle for the British. The rifle has an excellent reputation and performed admirably in its role during and long after the war. The No4 Mk1 (T) saw extensive combat use during the war on every front where there were British or Canadian troops located. It was based off of the SMLE rifle and modified by Holland and Holland in preparation for sniping use. The British No4 Mk1 (T) was the primary sniper rifle used by the British and Canadian forces during the second world war.
