An interesting discussion, but unless something changes over here it will be difficult.

1) Availability of appropriate ammo for British 2.5” guns.
2) Most people find the modern O/U easier to shoot and they are accustomed to using pocket rockets in the semiautos
3) There are areas requiring nontoxic shot (even in SD) making appropriate bismuth ammo expensive for the vintage guns.

It would be great to see a resurgence in the vintage guns.

Ken