CONSTRUCTION workers at the O2 Arena in London were in the news last week. Not because they scythed through someone’s broadband cable, mistakenly cut off the gas to thousands of homes and hoovered up all the fudge doughnuts and steak bakes in Greggs – they didn’t, so far as I know – but because they unearthed and then smashed to smithereens the Blue Peter Millennium Time Capsule .