Hello Flying10uk ...
For more background and finding answers quickly on our site, you might want to try our Google CSE custom search engine located in the top right corner titled Search Milsurps.com. It only searches our site using Google techniques and can be quite efficient. For example, in your case, type in the words enfield taps and dies and see what happens ..
I checked and there are dozens of posts covering that topic…
Example..
Member Paul S. posted this last year..
Here are a couple of helpful (hopefully) references:
This first one is from another forum member, Enfieldlock;
Threads for Lee Enfield Rifle
BA Tap and Dies;
http://mdmetric.com/britcut.htm
And, another;
British Tools & Fasteners - BA Thread Profile
Hope this helps ..
Regards,
Doug