'Trophy architecture' occurs when a developer employs a high-profile firm up to the stage of winning planning permission and then replaces the office in favour of a cheaper option.
Both of the vast quangos commission and work on huge numbers of projects across the capital and are, as a result, hugely influential on the wider construction industry.
'Design for London will sign off everything that the LDA does,' he said. 'From now on the LDA will not countenance a good architect being brought in to win planning and then being replaced with some jobbing architect.
'We really want to embed architecture and good design into everything that the LDA does. I will make sure that the same policy counts for TfL as well,' he added.
Unsurprisingly, Bishop's comments were also welcomed by RIBA president Jack Pringle, who said it was a major step in the right direction.
'I have not heard about this happening before so this move is very welcome - it underlines a commitment to good design,' Pringle said.