Appointment FAQs

With 50,000 appointments to fill every week, we sometimes need to cancel appointments because of unexpected circumstances, such as staff sickness, venue, equipment or transport issues. We may also cancel an appointment if something happens during a session that could affect donor safety.

To help make sure the right blood is available when it is needed, we may sometimes cancel appointments for donors with certain blood types. This allows us to offer more appointments to donors whose blood type is needed more urgently.

If you can, please book at one of our 28 town and city centre donor centres. These centres usually have more appointments available and longer opening hours.

If you would like more information about why your appointment was cancelled, call our helpline on 0300 123 23 23.

Thanks to the thousands of donors who regularly give blood, we are well supported across the majority of blood type.

We carefully manage appointments to make sure we collect the right amount of blood to meet hospital demand. When there is greater need for certain blood types, we may prioritise appointments for those donors. This means that donors with other blood types may sometimes see fewer appointments available.

Currently, we particularly need donors who are O negative, B negative and Ro blood types as well as people of Black heritage.

Our donor centres generally have more appointment availability and longer opening hours.

Appointments can become available at short notice when other donors cancel, so it is worth checking the NHS Give Blood app and www.blood.co.uk regularly to find appointments which suit you.

We know your time is valuable and we aim to see donors as close to their appointment time as possible.

Occasionally, delays can happen during a session. This may be because some donors need extra support or additional safety checks, or because unexpected situations arise on the day, such as someone having an adverse reaction or becoming unwell.

The safety and wellbeing of our donors is always our priority, and we appreciate your patience if your appointment is affected by a short delay.

Thank you for your understanding and for helping to save and improve lives through blood donation. Giving blood takes around 1 hour from your scheduled arrival time. The actual donation part, where blood is taken from your arm, is around 5-10 minutes.

We know it can be disappointing if you're unable to donate when you arrive for your appointment.

The safety of our donors and patients is our priority. Before every donation, all donors complete a health questionnaire and undergo a series of checks to make sure it is safe for them to donate and safe for their blood to be given to a patient.

Sometimes these checks identify a reason why someone cannot donate on that day. This may be related to their health, travel, medication, haemoglobin levels, recent lifestyle factors, or other eligibility requirements.

If you are unable to donate, our staff will explain the reason and, where appropriate, advise when you may be able to donate again. These checks are in place to help protect both donors and patients and ensure we continue to provide a safe blood supply.

Thank you for taking the time to attend your appointment and for your willingness to donate. Even if you're unable to donate on a particular day, your support is greatly appreciated.

We aim to collect the right amount of blood to meet hospital demand and ensure patients receive the blood they need, when they need it.

Different blood groups are needed in different quantities. Some blood types are used more often than others, while some are rarer and can be harder to find.

Some blood types are in higher demand from hospitals than others. For example, O negative blood is especially important because anyone can receive the red cells from O negative donors. This means it can be used in emergencies or when a patient's blood type is unknown. B negative is one of the rarest blood types, but because it can be used to help patients with several different blood types, maintaining supplies can be challenging.

Some patients also need closely matched blood to ensure the best possible treatment. This means we sometimes make targeted appeals to donors with specific blood types or from particular communities where those blood types are more common. For example, the Ro blood subtype is vital for many people living with sickle cell disorder who need regular blood transfusions. Demand for Ro blood is continuing to grow, and people of Black heritage are more likely to have this subtype.

Because blood has a limited shelf life, we carefully manage collections and sometimes need to target specific blood groups to increase stock levels. That's why we sometimes contact regular donors with the particular blood type we need and ask them to give blood.

Whatever your blood type, every donation is valued and helps save and improve lives.

We understand this can seem confusing. We aim to collect the right amount of blood to meet hospital demand and ensure patients receive the blood they need, when they need it.

Our appeals are often aimed at specific blood groups or donor groups where we need more donations, such as O negative, B negative or Ro blood, rather than all donors.

Appointment availability can also vary by location. Some community sessions may be fully booked, while appointments are still available at other venues, particularly our donor centres, which generally have greater capacity and availability.

In some cases, appeals are designed to encourage donors to book future appointments rather than donate immediately. Blood has a limited shelf life, so we carefully manage appointments and collections throughout the year to maintain a steady supply for hospitals.

If appointments near you are currently full, that's often a sign that enough donors are booked for that session. It's worth checking appointment availability regularly, as appointments can become available when other donors cancel.

Whatever your blood type, every donation is valued and helps save and improve lives.