Behavioural Insights Team, Madano and DECC co-drafted guidance for energy suppliers who wish to seek a derogation from the requirement to offer domestic consumers an In Home Display as part of a smart meter installation, in order to trial In Home Display alternatives. The guidance provides detail on the methodological approaches we would expect trials to adopt to ensure robust evidence is gathered. The evidence that DECC receives through the trials will inform considerations on whether the In Home Display mandate remains optimised to deliver consumer benefits, specifically, whether alternative feedback devices and methods can deliver equivalent or greater consumer benefits to In Home Displays.