Despite having a Turner with a WR action, I couldn't tell one from another if I were shot by one. Ilsley was a trade gun finisher, stocker and gun maker. According literature sent by a forum member:
"In about 1916-1921 he stocked guns or bought and stocked guns for John Robertson of Boss & Co, and did a considerable amount of stocking work for R B Rodda & Co where reportedly he was head stocker. In 1922 and 1923 he was recorded as Arthur Ilsley & Co, gunmakers, at 28 Whittall Street and Back of 27 1/2 Whittall Street. In 1924 and 1925 he occupied 8 Whittall Street. From 1926 to 1928 Arthur Ilsley traded under his own name from 16 St Mary's Row, but at about this time an address of 2 St Mary's Row and the name Arthur Ilsley, Central Gun Co, was also used. At the time, J Ward & Sons traded as Central Gun Co at this address. From 1929 to 1930 the firm traded as Arthur Ilsley & Co at 16 St Mary's Row. Between about 1927 and 1935, the firm made a few guns and bought others from the trade, selling them under the Ilsley name." He made and finished guns until 1966 and died in 1976 at 91. It's not clear when he stopped making guns in his own name, but he worked in the 1940's onward with J. Ward and Sons. An Ilsley SLE is depicted in trw999's long-running and mouth-watering Best of Brit Gun Porn thread (p. 4).