Ahead of the U.K.'s clocks changing for summer this weekend, meaning everyone loses an hour's sleep, KitKat launched an ambient campaign reflecting its long-running strapline, 'have a break'.

A series of ticking clock hands appeared on 120 screens at 20 London Underground stations during the evening of 24th March. The clock hands move around to eventually spell the word 'BREAK'. The same film was also projected on walls at five different London locations where there was late night work going on.