Variation of Condition 1 of planning permission dated 5th November 2021 (RN: 20/07701/FULL) for, 'Demolition of the existing fourth floor roof structures and erection of two storey roof extension to create new fourth and fifth floor level (including plant and roof terraces); all to enlarge office building (Class E). Alterations to front (western facade), installation of new windows throughout and associated alterations'; Namely, to make the following amendments to the approved development - internalisation of stair and associated adjustments to roof layout. (Application under Section 73 of the Act).