Britain’s history of eccentric, plucky sports cars has a newcomer this morning, from Aston Martin. Its bespoke Q division has taken the wraps off a one-off, 4.7-litre V8-powered rear-drive two-seater, the likes of which you’ve never seen before. Thought the Valkyrie was a tough engineering job, did you? Pah! Meet the Aston Martin Cygnet V8.