[9] Martin was involved initially with Patrick Hodgkinson in the Brunswick Centre, an early experiment in planned mixed-use development in Bloomsbury that was partially completed.

In the 1960s the British government commissioned Martin to draw plans for a wholesale demolition and redevelopment of the area between St James's Park and the Thames Embankment in London.

in Whitehall, which were then scheduled for demolition, and left the Banqueting Hall as a traffic island and the original Scotland Yard building enveloped in the middle of a courtyard of offices.

Through his skilled networking in support of promising younger architects, and his self-effacing work on committees, he strongly influenced the course of post-war British architecture.

"He was efficient, cooperative, impeccably well networked and calmly authoritative, justifying his advice with his immense architectural expertise and his scientific investigations of planning needs.

Martin and his wife, Sadie Speight, were responsible for the modernist house Brackenfell (Grade II listed) in Brampton, Cumbria.