Just for accuracy its an Enfield No.1 Mk111* not a No.1 Mk111. in this case the * denotes quite a difference.
The Mk111 is an earlier rifle, had windage adjustments on the rear sight, magazine cut-off and volley sights.
The Mk111* didn't have the above and was used by the Australians in both WW1 and WW2 along with India.