My son Jamie—really Robert James Anthony—is just like his dad. He's shy, unassuming and possessed of wicked sense of humour. Unlike me, he is huge—at 8 years of age he weighs 7 stone, is 4 feet 8 inches tall and strikes fear into the opposition as he plays loose head prop for Battersea Ironsides RFC Under 9 team. He's heavily into the usual boys' stuff, Chelsea, War Hammer, Scrapheap Challenge, Robot Wars, Game Boy, and Playstation. (He has a particular fascination for Lara Croft in Tomb Raider—I can't think …