Refurbishment of the existing building for continued office use including the reconstruction of the rear ground extension; new rear terrace; rationalisation of plant equipment; replacement of windows; internal alterations; upgrades to services, fabric repairs and altered decorations; and conversion of the third and fourth floors to ancillary accommodation for The Mercers' Company (as per 15/01308/FULL and 15/01309/LBC).

Refurbishment of the existing building for continued office use including the reconstruction of the rear ground extension; new rear terrace; rationalisation of plant equipment; replacement of windows; internal alterations; upgrades to services, fabric repairs and altered decorations; and conversion of the third and fourth floors to ancillary accommodation for The Mercers' Company (as per 15/01308/FULL and 15/01309/LBC).

Internal and external alterations associated with the conversion of the North Block to a function venue, museum, office space and archive store (Sui Generis) including: (i) repair works; (ii) window alteration and replacement: (iii) rooftop alterations including the formation of a rooftop plant enclosure; (iv) the formation of an access ramp; (v) internal reconfiguration to include the removal and insertion of partitions.

Conversion of part of the ground floor to two flats with internal and external works including: (i) reorganisation and refurbishment of the existing Estates office; (ii) internal reconfiguration and alterations including the removal and insertion of partitions; (iii) installation of replacement windows at ground floor to match existing: and (iv) the provision of a disabled parking space.