You can not realistically do that currently. No issues here in the States but in the UK you would need both a shotgun certificate allowing you possession of the gun and an export permit. Both are required even for antiques in the UK. Some exceptions may exist for obsolete calibers and firearms held off ticket, of that I am unsure. I can offer you a discounted price on importing antiques as it is less involved on my end but my exporter would still need to get the export permit approved for you.

Steve

Firearms imports, consignments


[Linked Image from i.imgur.com]