Randomisation: It is intended that a trial resulting from this study would have a random controlled cluster design to overcome this. All eligible patients in one locality will be exposed to the intervention and all eligible patients in the other locality will not be exposed. Randomising at community nursing team level in a cluster trial could lead to contamination, as within the locality nurses may cover for other teams at weekends and during periods of staff absence. If this feasibility study leads to a larger trial, it would be possible to randomise at locality level to reduce bias. Non-randomised feasibility studies do not have reduced validity (Craig et al 2008).