This trial aims to investigate the use of blood stem cells from related donors for the treatment of haematological malignancies such as leukaemia and lymphoma. The trial is being conducted at St Vincent's Hospital in Sydney plans to recruit five patients between May 2009 and February 2014. Participants will receive stem cells from a related donor (haploidentical identical) blood stem cells. Donors will be injected with GCSF following which they will have stem cells harvested from their bone marrow as well as from their peripheral blood (GCSF primed bone marrow harvest + augmentation with peripheral blood stem cells). Patients will initially undergo chemotherapy following which they will be injected with donated stem cells. The patients will also be given the standard GVHD prevention immunosuppression regime. Participants will be monitored for complications and assessed for changes in their clinical condition.