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Know your type

Click Here: To know your type


Giving blood for the first time

Tens of thousands of people are doing something amazing by registering to join our growing community of blood donors - ready to save lives when the NHS needs them.

At the moment we particularly need:

  • Male donors - men can donate more often than women

  • Black donors - Ro blood is needed and a common type for black donors

  • O negative donors - hospitals need this blood type most regularly, as it can be given to all patients

Please register if you are in one of these groups.

As a new donor, we know you're eager to give blood and save lives straight away. We understand it's disappointing if you can’t find an appointment immediately. But don't worry, your help will be needed in the future so please search several months ahead.

Click Link: Give Blood

Giving Blood

Thank you

Every donation saves a life and the need for blood never stops.

Your blood could go to a mum who’s just given birth, someone who’s been in a car accident or a child with cancer to name just a few.

Ro blood

What is the Ro subtype and why is it important?

Donors with the Ro subtype

Some people rely on donations of the Ro subtype. Please keep donating if you have the Ro subtype.

Coronavirus has resulted in some changes and extra safety measures when you donate.

Find out more about  Giving blood during coronavirus

What is the Ro subtype?

The Ro subtype is a variation of the Rh positive blood type. You might have it if you have O positive, A positive, B positive or AB positive blood.

Everyone has a blood subtype so having the Ro subtype does not mean there’s a problem with your blood.

Dr Alexander Weiner discovered these subtypes in 1943 and gave them simplified names, which is where the name ‘Ro’ comes from.

Why is the Ro subtype important?

Subtypes are important if you receive regular transfusions and need blood that’s compatible with both your blood type and your subtype.

The Ro subtype is particularly important for two reasons:

  • demand is increasing by 10-15% each year

  • only 2% of regular donors have the Ro subtype

So there’s a gap between the number of donations we collect, and the amount of Ro blood hospitals need.

Ro blood is a Rare Blood Type and there are patients in real need of it.

We need more blood donors with the Ro subtype to make sure the right blood is available to everyone who needs it.

Finding out if you have the Ro subtype

You usually won’t find out blood type or subtype until you give blood for the first time.

If you have the Ro subtype, we'll let you know after your first donation. 

Did you know?


You are ten times more likely to have the Ro subtype if you are of black African or black Caribbean heritage, compared to someone of white heritage.

That’s one of the reasons why We need more black people to become blood donors


The Ro subtype explained

Find out about the combination of genes that make up the Ro subtype

More about the Ro subtype

Rare blood types

Some blood types are both rare and in demand

What makes blood rare?

Why is demand for the Ro subtype increasing?

Ro blood is vital in treating sickle cell – a group of inherited blood conditions that affect red blood cells.

The condition is often treated with regular blood transfusions so subtypes, such as Ro, are important in ensuring patients get blood which is most compatible with their blood type and subtype. 

Many people with sickle cell have the Ro subtype. This is because sickle cell more commonly affects people from black ethnic backgrounds where the Ro subtype is more common.

There has been an increase in the number of people with sickle cell and as a result, the demand for Ro blood has grown.

Become a blood donor

To get started, you'll need to register your details on our database. We will ask you to:

  • answer some basic questions to check you are most likely to be able to donate 

  • register and validate your email address

  • complete your personal details to set up your account

If the website is busy, we’ll take some basic details and get in touch later to complete your registration.

Click Link: Give Blood

Have you ever wondered what happens to a donation once you have given it? Here’s what happens to a whole blood donation when it leaves one of our blood donation venues.


Every day over 6,000 people in the UK need to give blood to meet the needs of hospitals and patients. We need to make sure that we have enough supplies of all blood groups and blood types to treat all types of conditions.


Find your local donor centre and book your next appointment today.


Register now: GIVE BLOOD  or call 0300 123 23 23

The journey of  a blood donation

The journey of a blood donation

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