THE National Blood Service is urging people to give blood before going on holiday this summer.
As some jet off to foreign climates over the summer, there are less people in Britain to supply the 9,000 units of blood the NHS needs every day.
In Yorkshire and the north-east alone, 1,000 units of blood are needed daily.
Around 30% of the blood is used to treat people in accidents and emergencies, 20% is used for general surgery, 15% for orthopaedic surgery, 10% in maternity treatments and 25% for non-surgical uses.
Blood cannot be stored for long as cells die after 35 days.
Despite the need for blood, just 6% of the British population donate it.
Rachel Roberts, of the NBS, said: "Please take the time to give blood.
"We know it's a busy time of year but if you can, put giving blood on your to-do list.
"One donation can save more than one life - so please help us keep our stocks up over summer."
To donate blood, you need to be aged between 17 and 60 and in good health. You must weigh over 50kg.
Donors can give up to three times a year.
Contact the 24-hour National Donor Helpline on 0845 7711 711.
Alternatively, visit www.blood.co.uk