Sheppard Robson has insisted it was not approached to work on the redevelopment of the BBC's Broadcasting House until after MacCormac Jamieson Prichard (MJP) had been dropped.
Sheppard Robson - which was unveiled as the architect of the second phase of the scheme on Friday - insisted that the first it had heard of the appointment was only a week ago.
That would mean that the office was brought in just four days after the news was released that MJP had been dumped and would not be over-seeing the largest phase of its competition-winning designs.
It has also become clear that Sheppard Robson will be novated to the contractor Bovis Lend Lease, a role that had caused so much trouble for MJP.
But a spokeswoman for the practice insisted that they were delighted by the appointment. 'We are pretty pleased given the high-profile nature of the project.
'By the time that we became involved, MJP were already off the scheme and so we were not too worried about it,' she added. See our previous news storyby Ed Dorrell