So far Mrs Baughen (right) has been unable to find a suitable donor
A mother who urgently needs a bone marrow transplant has urged volunteer donors to come forward.
Rachel Baughen, from Clerkenwell Green in the City of London, has potentially fatal chronic myeloid leukaemia.
Her best chance of survival is a bone marrow transplant. Potential donors can register at St James's Church in Clerkenwell from 1200 GMT on Wednesday.
Daughter Charlotte, 18, said: "We want our mum to beat this disease but need everyone's help to do so."
Mrs Baughen's husband Andrew is the vicar at St James's Church and they also have a 16-year-old daughter called Harriet.
Earlier this year Mrs Baughen was diagnosed with chronic myeloid leukaemia, a cancer of the white blood cells.
She had an intolerance to the drug treatment she was given and has so far been unable to find a suitable bone marrow donor.
Mr Baughen said: "It's been a strange time for us all as Rachel and I continue to keep busy in the parish but have this terrible condition living with us each day."
Each potential donor will be asked to give a saliva sample at the church on Wednesday, at a clinic run by the Anthony Nolan Trust charity.
Charlotte said: "This is the one last chance for mum to find a donor, so Harriet and I are doing everything possible to get donors along to the clinic."