What does a £100,000 ‘invisibility cloak’ look like? Funny you should ask …

Three years’ research and a lot of very expensive materials have gone into Steve and Nick Tidball’s thermal camouflage jacket. Can its wearer really blend into the background?Harry Potter’s invisibility cloak arrived in a parcel for Christmas, with a note from Dumbledore: “Use it well.” Ron Weasley’s reaction was, as you might expect, to be insanely jealous. Who, after all, hasn’t dreamed of having the power of passing through the world without being see