'WARNING! Being grumpy could give you a stroke...and I should know': Celebrated grouch Jenny Eclair tells of the danger of high blood pressure

Like millions of Britons, Jenny (pictured) was completely unaware she had high blood pressure. 

But when she visited her GP before embarking on a 50-date tour she was given some concerning news. 

Her blood pressure was not just high, it was dangerously high. 

She was fitted with a 24-hour heart monitor and its results lead to a diagnosis of hypertension.