 In January 1944 , Edward <unk> was appointed Principal <unk> for the UK . <unk> worked extensively for the Commission for 25 years until 1969 , becoming Chief <unk> and also succeeding Kenyon as Artistic <unk> . Together with <unk> , the other Principal Architects appointed during and after the Second World War were Hubert Worthington , Louis de <unk> , Philip <unk> and Colin St Clair <unk> . 
