A campaign to target high blood pressure has found 40% of UK adults suffer from the problem.
The Blood Pressure Association (BPA) said the West Midlands, and Yorkshire and Humberside have the worst cases as 45% of people tested in those areas have high blood pressure.
Nationally, Wales and Northern Ireland have around 44% of the adult population suffering from high blood pressure, 40% of people in England experience problems, and 39% in Scotland.
The lowest incidence in the country was found in London, but the study found one in three of those tested still have "concerning" blood pressure levels.
Blood pressure can be lowered by eating more fruit and vegetables, avoiding salt, taking exercise, and only drinking alcohol in moderation.
Dr Mike Mead, a GP and medical adviser to the BPA, said: "High blood pressure is a serious health condition.
"Uncontrolled high blood pressure is the biggest cause of death and disability through the strokes and heart attacks it causes. But this is preventable.
"We urge everyone to make it their New Year's resolution to have a blood pressure check and lead a healthier lifestyle to lower their numbers.
"Looking after your blood pressure is one of the most important things you can do to improve your current and future health."
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Blood Pressure Association
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