Bloody hell Wired.<p>Blu Tack was invented in Leicester, and Bostik still make it there. It's reusable and doesn't set or cure, though it deteriorates a bit after a decade in a drawer. Can repair pretty much nothing, but handy for sticking posters to walls. :)<p>Sugru is/was a silicone putty that cures after a few minutes in air, and expires in a few months in the packet. Seemed terrible value for money based on the tiny packet I bought so I'd never buy again.<p>At least with two part putties you can keep plenty in a drawer, for years, they don't cure until you've mixed them and cost a fraction of Sugru.<p>Edit: Well this provoked quite the discussion. If you're looking for repair putty the two main UK brands I know are: Araldite (Now a US brand, mainly DIY and automotive, also epoxy adhesives), and Milliput.com (Epoxy modelling clay, perfect for repairs to plastics, steel etc. Comes in a few grades and colours), with shelf life in decades. Milliput are Welsh. :)