This report summarises findings from a multi-measure water efficiency trial conducted as part of Essex and Suffolk Water’s long-term water efficiency programme. Customers in Chelmsford were fitted toilet dual flush devices and received a home water audit pack to improve water-saving practices. 18.7 % of the 4,866 customers eventually took part and 1,012 devices were installed in 555 properties. 187 customers completed and returned their home water audit form. Based on information from meters and data loggers, properties saved on average 31.38 litre/property/day. This equates to a total saving of 0.017 Ml/year for the project study area.