Nationalist, academic and campaigner Dr Millward was asked to tutor the heir to the throne before his 1969 investiture. Prince Charles admitted he may not have been the finest pupil the doctor ...

Then-Prince Charles, wearing the gold coronet of the Prince of Wales, looks on at his investiture as Prince of Wales on July 1, 1969 in Caernarvon, Wales. Picture: Anwar Hussein/Getty Images MORE ...

Lord Snowdon leafs through his 'scrapbook' from Prince Charles' Investiture (archive)Lord Snowdon leafs through his 'scrapbook' from Prince Charles' Investiture (archive) ...

The Urdd, like many other organisations, had been torn apart by conflicting views on the investiture ... at the time - an appearance by Prince Charles at the Eisteddfod during his stay at Aberystwyth.

Charles III was described as a ... as well as being able to speak some Welsh. He was made Prince of Wales in 1958, aged nine, with his investiture at Caernarfon Castle, Gwynedd, in 1969.