University College London Hospital is one of those to have started using the technology.

Clinical lead Ed Seward said: “Colon capsule is a new innovation that has recently become available and involves swallowing a camera pill that takes pictures of the bowel as it passes through.

“Not only does colon capsule increase our diagnostic capacity, because it doesn’t require the resources of a dedicated hospital space to do the examination, it also allows us to do the examination in the patient’s home.

“So patients who may be shielding or cautious about going to a hospital, can perform the procedure in the comfort of their own homes.”

Dr Alastair McKinlay, President of The British Society of Gastroenterology, said: “We welcome any initiative that seeks to simplify and improve the early diagnosis of gastrointestinal disease and, in particular, colorectal cancer which unfortunately is still responsible for many avoidable deaths.”