HDR50 - Home Defence Pistol In England?

There is a pistol on the market that in Europe is sold for "home defence". The Umarex HDR50 (home defence revolver). The same pistol is available in the UK but with a slightly different tagline. I look at the reality of using something like this for home defence in both the functional and legal terms in England. As usual I mention UK in the video but be aware that Scotland has very different laws regards Airguns.
RE-UPLOAD DUE TO AUDIO ISSUES - Sorry we lost all the original comments!!