They accept if you're a registered member of a Rifle Club, or can prove shooting rights to a peice of land. The 'need' can be anything from pest control, target shooting, deer hunting etc. I'd say it's less of a 'need', more like a valid and acceptable reason. 'Cos lets face it, no-one these days
needs a rifle and everyone including the police know that. That shouldnt stop people from owning them though
The hardest part is the getting shooting rights/ aquiring membership of a club though I'd say. Not that I own a FAC so I may be wrong, I'm just going on what I've been told by fellow shooters who do.