Many thanks for the reply.
So we have a FOI reply from the HO saying that they know of no involvement in the AT decision.
... and a guy who attended the meetings saying that the threat came from the HO, suggesting that something needed to be done to stop people easily upping the power of their guns or action would be taken re license etc.
I'm interpreting the FOI reply as ... the HO have no record on file of an official, documented request from the HO for something to be done.
If this was a TV episode of "Call My Bluff" I know where my money would be.
I accept that we probably do pay for any additional cost of AT as that will be priced in to profit margins.