A Delete Blood Cancer drive will be held on Saturday at Asda Westbrook.
From 10am to 3pm, customers are invited to sign up to the register for stem cell donation.
Those wishing to sign up will need to fill in a form and provide a saliva swab.
The event has been organised as part of a campaign to find a donor for seven-year-old Finn McEwen.
Finn, who is from Liverpool, has just been diagnosed with Myelodysplastic Syndromes (MDS), a bone marrow disorder that in children can rapidly develop into acute myeloid leukaemia.
For more information visit deletebloodcancer.org.uk/register-now
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