Amendments to planning permission dated 07 April 2017 (RN:16/06616/FULL) for the: Demolition of Ergon House and construction of eight storey residential building incorporating a ground floor retail unit (Class A1) and partial demolition and reconstruction of rear wing of 9 Millbank and conversion to residential use to provide 161 residential flats. Conversion of the gatehouse on Dean Bradley Street to provide a single dwelling unit. Provision of basement car parking and landscaped courtyards, NAMELY to vary condition 31 to read as follows: 'You must apply to us for approval of details of tests undertaken on the installed CHP system to demonstrate that it conforms with the details modelled in the updated air quality assessment presented in the letter from Parsons Brinkerhoff dated 11th November 2016 and titled "WSP | Parsons Brinckerhoff Response to GLA Air Quality Comments - Ergon House (16/06616/Full). You must submit the relevant details to us for approval within three months of occupation. You must then carry out the development in accordance with the approved details.'