Developer Glenkerrin, which is behind the proposals to create around 700 new homes and 2,250m2 of shops, had originally appointed both HKR and John Pardey Architects to carry out the entire project.
However, yesterday the AJ reported that the Irish property company has turned to Foster to work on the landmark high-rise residential tower at the heart of the development (Foster & Partners takes over key part of HKR's west London shopping centre scheme).
Now senior HKR director in charge of the scheme, Jim Duffy, has hit back and claimed that his firm 'still has a central role in the masterplan' and 'remains the key designer for the bulk of the scheme'.
Duffy added: 'It is true that Foster & Partners is going to be designing the large residential tower, and we will be pleased to work with them - as we are with John Pardey.
'It is naturally disappointing when you lose any part of a scheme, but at the end of the day we will do whatever is best for the project and the client.'
The AJ understands that of the five remaining 'urban' blocks to be built on the massive scheme, HKR will be responsible for three and John Pardey for two.
'We are still key to Arcadia' claims HKR, despite Foster role