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Noticing blood in your poo - which may appear black or dark red in the toilet bowl - can be a sign of bowel cancer.

If there is no other obvious cause for the bleeding, such as piles, the NHS recommends that you ask for an appointment with your GP, external.

The NHS also advises a check-up if you notice changes in your regular toilet habits, such as having to poo more often, or a pattern of diarrhoea or constipation.

Abdominal pain or lumps, stomach bloating and unexplained weight loss are also among symptoms which should lead to a bowel cancer test.