The Atmos Clock. It may not be very new, but it certainly is v clever – ‘The power consumed by a 15 watt light bulb could run over 60 million Atmos clocks simultaneously!’ Prices start at v expensive and work their way elegantly upwards.

‘The technological concept is a remarkable one. Inside a sealed capsule, a mixture of gas and liquid expands as the temperature rises and contracts as it falls, moving the capsule back and forth like a tiny unseen accordion. This motion is used to constantly wind the mainspring thus enabling the clock to run and keep perfect time. A small temperature variation of just one degree is sufficient for over two day’s operation. Such variation occurs naturally in normal room temperature and thus without any additional sources of energy, the Atmos clock will continue to run, if left untouched, “forever”.’