SIR - I’m writing to appeal to your readers to get involved in Blood Pressure UK’s Know Your Numbers! Week from 15 to 21 September. A shocking eight million people in the UK are at risk of a stroke or heart attack because of their blood pressure.

We’re asking everyone, of all ages, to take a moment to visit one of Blood Pressure UK’s pressure stations during the week to have a blood pressure test and know their numbers. If left unchecked and not dealt with, high blood pressure can lead to a heart attack or a stroke.

You wouldn’t know you have high blood pressure unless you have it checked, which is why it’s called ‘the silent killer’, but the good news is that if detected with a simple, quick and painless test, high blood pressure can be successfully managed and returned to a healthy level.

Please follow us on Facebook and Twitter and share the #KnowYourNumbers and other content during the week to help spread the word.

You can also text NUMBERS to 70003 to donate £3.

Katharine Jenner, Chief Executive Officer at Blood Pressure UK, London