The Stirling Prize-shortlisted practice had been recommended for approval for its plans to replace three existing buildings with one office, retail residential building.
But the committee ‘referenced the building back’ meaning the designs will have to changed and the plans will be subject of a future planning committee.
According to a letter from the Victorian Society in response to the planning application, the proposed development did not ‘relate to the existing and retained’ 19th-century buildings.
The Victorian Society added: ‘The proposed development will be extremely detrimental to the character of the conservation area and does not represent an improvement or enhancement.’
Meanwhile, Eric Parry Architects has won planning approval for a 15-storey building on Fenchurch Street in the City of London.
The plans include the demolition of six existing buildings to be replaced by an office and retail buildings, with a rooftop garden.