Teeth grinding, snorting, gasping, jaw clenching and choking – the nation’s long-suffering partners are being kept up at night by noisy mouth breathers, snorers (which I’m still blaming on my pug) or those with more serious sleep disorders such as sleep apnoea. I visited a laboratory on a University of Cambridge science campus for Sleep Awareness Week to meet a team of engineering PHD students and their professor who have been beavering away on an invention using the wonder material graphene