Variation of condition 1 (approved plans) pursuant to planning permission 20/AP/1658 (Construction of mansard roof extension and conversion of existing building (ground floor office) into two flats, 1 x 2 bedroom at ground floor and 1 x 2 bedroom duplex at at first and second floor levels incorporating external terrace at second floor) to alter and extend the rear mansard and reduce the size of the roof terrace.