Proposals by Eric Parry Architects to refurbish and extend a landmark 1930s mansion block development in Westminster have taken a step forward now that the owners have secured a certificate of immunity from listing.

Dolphin Square has three times been the subject of unsuccessful listing bids, the most recent of which was launched by the Twentieth Century Society last year.

But Westbrook Partners has now secured a five-year window in which to press on with its redevelopment plans, drawn up by Parry and submitted for approval in February.

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