I have yet to see a thread on here entitled, 'how can I get an air pistol' or 'explain the licensing system for a .22 pistol' I fear it will take a Hollywood blockbuster with Sparks saving the world with his match air pistol before we see one of those.
While on a good point there Demon,I think the air pistol thing is not paid much attention,because Most folks experiance of them would possibly be from the UK where they are considerd toys at best or nusiances at worst.
 On the continent air pistol and rifle is and has been a liscense free way of getting into shooting, with little or no cost,where nearly every town,hamlet and village has a shooting club,in the local hall,pub or whatever.Here,that has never existed.
 Hassle factor,If you are going to own a liscenseable firearm why bother going to all the hassle of owning a "toy" when you can own the "real thing"???
It is the same reason that the crossbows pretty much died out in Ireland,why have an expensive PITA toy when for the same price you could have a proper 22 rifle with appx 500 rnds of ammo as an equivlant buy?
Despite that there are folks out there who shoot match crossbows and air pistols that cost more than three glocks put together.
Unless air weapons came off ticket alltogether [two chances of that] INMO,threads like this will always appear.Then trouble is you are then giving the muppetts and heads out there a much more dangerous weapon than what they had before to create more mischeif.Catch 22 situation.