Ah the joys of dealing with the plod in the UK. Yes if you want to be an enfield 'collector' over here, it pretty much must be in slightly butchered shotgun form unless you're a firearms dealer, or are persuasive enough to somehow prevail upon your local firearms officer that having ten 303 slots on your ticket is perfectly reasonable and justifiable. (shotgun licenses allow any number of guns, storage space permitting I believe)
Point two above re putting woodwork on a barrelled action is absolutely ludicrous - can they really have thought that to be the case or were they just being deliberately obstructive?