Half of overweight Britons have cancelled plans because they feared they would not fit into seats or be comfortable while out, a study has found.

Research from online healthcare provider Numan suggests millions of UK adults could be abandoning major events such as weddings or flights over concerns about their size and comfort.

Around two-thirds of UK adults are classified as overweight or obese, meaning they have a body mass index (BMI) of more than 25, or 30 respectively.

Numan's findings suggest the nation's so-called obesity epidemic is fuelling widespread 'seat anxiety'.

The survey of 3,000 British adults, named the Seat Anxiety Index, found that 34 per cent of overweight or obese participants dreaded being in the middle seat on a plane.