He commissioned a new completion of Prokofiev 's Cello Concertino from the Udmurt musicologist Vladimir Blok with the BBC National Orchestra of Wales conducted by Mark Wigglesworth .
Vladimir Blok was premiered on 11 April 1997 in Cardiff .
He commissioned a new completion of Prokofiev 's Cello Concertino from the Udmurt musicologist Vladimir Blok , which was premiered on 11 April 1997 in Cardiff , with the BBC National Orchestra of Wales conducted by Mark Wigglesworth .