As a PS I am like most people In the British gun trade concerned with the problem and agree whole heartedly that a solution needs to be found.
But , this is our problem and endless discusion on an American web site is not the answer. Discussion within the British Trade and investigation by the Proof Houses is what is needed . If indeed London is "blowing up barrels " then use Birmingham as they do not seem to have the same problem.
I say again this is a British problem ,washing our dirty linen in public is not going to help.
gunman, with the greatest of respect, I'd disagree. This is an international forum populated primarily with people who care deeply about British made guns - many of us consider them an international treasure and wish to give them the most sympathetic use and care possible. Some here are deeply interested in gun technology, including the various proof systems. It is my understanding that proof failures are uncommon due to the requirements for pre-submission prepration; a failure in testing usually means something in the preparation-viewing-firing schedule went wrong. When the failure is limited to one specific type, bulges in front of the chokes, one suspects a process failure rather than a speciman failure. Safety system process failures are alarmingandrequire an explaination rather than an "All clear!"
Yes, I do "peek at the works." I am unabashadly interested!! And,by the way,I do know a bit about testing.
All said in the spirit of comradship and with all due respect.