The local collaborator will transmit comparability data to the study co-ordinator who will pass it on to a nominated medical consultant (Professor Mike Murphy) and the study statistician. If both parties are satisfied that the two clinical areas are comparable, confirmation will be transmitted to the local collaborator together with authority to commence the two-week baseline audit. Once the baseline is complete the local collaborator will contact the statistician, via the co-ordinator, to be informed of the area for intervention. The local collaborator will then inform the blood bank of the intervention area.