Claim: One in four cancers are as a result of smoking.
Fact-check: Smoking causes about one in four deaths from cancer - Full Fact
Verdict: this is not quite right. around 15% of cancer cases are caused by smoking in the uk. but it does cause roughly one in four cancer deaths.
Organisation: Full Fact
Author: Leo Benedictus
Date published: 2023-11-09T00:00:00