We had one (live) on show at an HBSA Exhibition about eighteen months ago. If I remember correctly it was still in .55 as well.
The guy didn't seem to have had much trouble with plod. As long as you have a 'good reason' (HBSA Membership?) and somewhere to shoot it, what could be the problem?
Yes. I'm going for a mooch around the HBSA Arms Fair on Saturday and first try of my new SMLE on Zero if it isn't packed.