Obese people will be routinely refused operations across the NHS, health service bosses have warned, after one authority said it would limit procedures on an unprecedented scale.

Hospital leaders in North Yorkshire said that patients with a body mass index (BMI) of 30 or above – as well as smokers – will be barred from most surgery for up to a year amid increasingly desperate measures to plug a funding black hole. The restrictions will apply to standard hip and knee operations.

The decision, described by the Royal College of Surgeons as the “most severe the modern NHS has ever seen”, led to warnings that other trusts will soon be forced to follow suit and rationing will become the norm if the current funding crisis continues.