Sch A1 para 26
Where G knows or has reasonable cause to believe that an alteration has been made to the green deal property which, had it existed when the estimated first year savings were calculated, would have affected that calculation materially, the following form of wording— “The property may have been altered in a way which affects the operation of the improvements installed under the green deal plan. You may not realise the estimated savings shown in this EPC. You are advised to check the position with the owner.”