Prepare yourself for a relentless onslaught of legendary British voices, classic Aardman stylings, slick 3D and more Christmas spirit than you could shake even a really big candy cane at – it could only be Arthur Christmas. And it’s totally, overwhelmingly charming, just like you knew it would be. What are you doing on a computer? Just go and watch it, Scrooge – and would it kill you to wear a snazzy jumper?