An old copy of Aeroplane magazine has a pilot biography of Norman Tebbit. Types flown with BOAC included the Avro York, Argonaut, Britannia, DC-7C and the B707 which he flew for a decade. No mention of the VC10.
He completed a captain's course on the B707 in the winter of 1969-1970, just before leaving BOAC for a career in politics.