ShooterNurse,
Well, Alan deEnfield beat me to it. And he did it well! Excellent history there, Alan.
To answer your question as to what identifies it as a Peddle Scheme, the answer lies at the buttsocket. It will only be marked GR, the year of manufacture, and ShtLE III*. I have two at the moment, an all matching and original 1918 SSA, and a 1917 SSA rebarreled in 1937 and issued to Fianna Fail, or the Irish Free State Army. Am always on the lookout for that somewhat elusive NRF rifle!