Exactly what I was going to say Lee.
We had a mass shooting in the UK at Hungerford in 1987 and gun laws were adjusted accordingly, and then again after the Dunblane massacre in 1996. We've only had one mass shooting in the UK since, in Cumbria in 2010.
Who in the hell can self-justify that it is legitimate to need to own automatic weapons simply because it's in a law that was written in 1791?