I was advise on another website that whan using a British web sling from WWII

[Peter Laidler]

Nope....... The leather sling was only issued with the No4T sniper rifle whereas the webbing sling was issued /approved for both

And remember that the P-H front trigger guard sling swivel is not nor ever was an issue item on the No4, No4T or the No8 - nor nuffink else! There is a distinct and instantly recognisable difference between the Ordnance issue sling swivel and the commercially available P-H sling loop