Concealment mechanism {16b}
Once randomisation has occurred and each ward is allocated into a cluster, this information will be kept by the person undertaking randomisation on their own (work) computer. This allocation will not be available to the participating wards or PSAs or those involved in data collection. Each participating ward and PSAs will be informed of the cluster allocation 2 weeks prior to the commencement of the intervention of that cluster. This concealment process will be undertaken by the person undertaking the randomisation informing the trial coordinator of the allocation, as per the timing above. The trial coordinator will then inform the ward and PSAs.