A couple of quick ? on my No.4 Mk I

[Rule .303]

Ooops, you're right. I meant Upper Heyford. Well, Upper Heyford and Fairford, sound the same and easy to mix up but both in Gloucestershire .................... aren't they?

I worked the IAT in 1985. The theme that year was Aerial refueling. We had Tankers from all Nations.
__________________________________________________ ____
So, when was the piling swivel deleted from British service rifles?

What is purpose of the small loop on the trigger guard? (fwd. of mag well)

Having trouble posting pics, I'll try again.