Don't know what it takes to play with their stuff, but, when I visited the Pattern Room at Enfield Lock, I needed a letter from MOD/QAD - Ministry of Defence/Quality Assurance Directorate AND a letter permitting me to bring a camera. Took 5 months to get it all.
After that, it was just not get eaten by the 2 guys at the gate with Sterlings and then have one of them walk you to the correct door and turn you over to the people inside. When I got there, they knew more about me than I did; I had been investigated very completely and didn't even know about it! And I was on Fogo Island!!!!!
In all fairness, Enfield still was an operational factory, building FALs, GPMGs and the new IW in its X-70 version: very hush-hush.
A lot of BS..... but, oh, dear GAWD: to see Maxim Serial Number 1 and, on the next table, Serial Number 100 with ALL the mods.... and the sole existing DWM 1908/16 and FOUR HUNDRED Lee-Enfields all in one room and no two alike.
Aladdin's Cave.
But I never had time to see the Armouries.
So, Tony, what DOES it take?