Convert existing maisonette on first and second floors to 2no. flats and alterations to elevations

Proposed change-of-use of first and second floors from offices (class B1(a)) to residential (class C3) to form 9 one and two bedroom flats and part change-of-use of ground floor from retail (class A1) to residential (class C3) to form entrance foyer. Minor alterations to rear fenestration, replacement of entrance door/screen/windows and installation of velux window.