Caterham

This year's Festival of Speed was host to a wide range of reveals, from hydrogen-powered off-roaders to electric roadsters.

Caterham claims its EV Seven concept, set for a reveal at Goodwood, is still as capable as a petrol Seven and weighs under 700kg.

Even the iconic Caterham Seven will get an electric powertrain, though the boutique British brand says both it and a new EV roadster are years away.

Things that weigh more than the Caterham Seven 170 include some grand pianos, cows, and Atlantic bluefin tuna.