AC adapters stuffed into your personal item when globetrotting, the plug used in Merry Old England must surely be the most cumbersome -- its three copper prongs flung to the extremes of a giant block of plastic. That Victorian holdover gets a major re-do with this UK Folding Plug concept. The two horizontal prongs rotate themselves in-line with the top, vertical one, and the body of the adapter then folds in half, resulting in a thickness of about 1cm. Interestingly the plug would still work in either position, with a slimline power strip envisioned to accept three of these slender lovelies at once. It's positively brilliant, but is just a concept at this point, and while we don't have any news to pass along about its likelihood for production, surely some manufacturer will watch the video after the break and start churning these out by the millions.