G'Day Fella's,

Texas John, I have the same rifle in .222Rem (but it's not in as good condition as your Hornet).
Their a great little rifle.

As Sarg said above + apparently, these may be "Royal" model rifles.

Iirc and FYI, this is the email address for the British supplier of available parts for BSA's (Bezzer's).
enquiries@airgunspares.com

I'll try to locate their web site for you, and post it here shortly.
http://www.airgunspares.com/store/

Lest We Forget!
Homer