21 Upper Montagu Street London W1H 2PQ
Detailed drawings of roof, showing detail of natural slate which must be natural Welsh slate, dormer windows which must be double hung timber sash windows including details of glazing which must be slim line double glazing (14-16mm overall thickness) with integrated glazing bars, with no trickle vent and details of lead work pursuant to condtion 3 of listed building consent dated 27th June 2025 (RN:25/00195).