There are thought to be 850,000 people who don not know they have type 2 diabetes.
A record breaking three million people have now been diagnosed with the disease, and experts are warning unless more is done to prevent the condition, the NHS could become burdened with unsustainable costs.
Diabetes sufferer Lynda Marks said dealing with the condition is much easier once you start talking about it.
She said: "It's difficult... to begin with."
More top news
The Prime Minister will admit to concerns that the current system is narrowing access to poorer students.
Turning colder and brighter towards the end of the the week.
Detectives have launched a murder investigation after a man was fatally stabbed in Kensington.