Unless you're despirate for the feel of shooting with real bullets, have you considered airsoft?
The guns are realistic, pistols even "blow back" with every shot, and you have a wider range of guns to choose from.
You don't need a licience, just to be 18, and keep them in a sealed container (bag or box), and unloaded when in transit.
They're safe, although shooting glasses should be worn, and you can use them in your back garden as long as you're not within 15m of a main road.
www.airsoftarmoury.co.uk