Not just classified for UKLFS but also for the HIRTA info (High Intensity Radio Transmission Area for those that don't know).
What Limit, why don't you contact Shawbury - if you're going to do instrument approaches there I'm sure the SATCO would only be too pleased to fax you some plates - after all he/she wouldn't want to you follow out of date procedures and crash
By the way, under Bliar's "Wider Market Initiative" you will be charged a ridiculous sum for instrument approaches at an MOD airfield - my advice? Go to Liverpool, Coventry or Wolverhampton!
Regards
LJ