Small lean-to single storey extension to provide a secure cycle storage facility (as required by Condition 9 of Planning Permission 21/0959/FUL, and to provide a boiler room to accommodate an air source heat pump, its equipment, controls, and hot water storage cylinder, also underfloor heating manifold together with a standby boiler. 2) provide an external staircase pod to the eastern gable end wall. 3) minor re-siting of dwelling within the existing site.