Change of Use from B1a to C3 with associated alterations to divide thebuilding into 2 maisonettes and 1 flat, removal of upvc windows to front elevation and replacement with correct style of timber box sash windows, replacement to 2 windows facing onto courtyard with doors to provide access to amenity space. Application under s73a to remove conditions 4, 6, 7 and 14 of permission reference 161550 (retrospective)