heir, Edward of Woodstock (also known as 'The Black Prince'). A charter was also created which ruled that the eldest son of the king would be the duke of Cornwall. No formal public role or responsibility has been legislated by Parliament or otherwise delegated to the prince of Wales by law or custom. In that role, Charles often assisted Elizabeth II in the performance of her duties. He represented her when welcoming dignitaries to London and during state visits. He also represented the Queen and the United Kingdom overseas at state and ceremonial occasions such as funerals. The prince of Wales has also been granted the authority to issue royal warrants. British (formerly English) insignia As heir apparent to the sovereign, the prince of Wales bears the royal arms differenced by a white label of three points. To represent Wales he bears the coat of arms of the Principality of Wales, crowned with the heir apparent's crown, on an inescutcheon-en-surtout. This was first used by the future Edward VIII in 1910, and followed by the most recent prince of Wales, now King Charles III. The heraldic badge of the three feathers is the badge of the duke of Cornwall, or heir apparent to the British throne. The ostrich feathers heraldic motif is generally traced back to Edward of Woodstock ('The Black Prince'). He bore (as an alternative to his differenced royal arms) a shield of Sable, three ostrich feathers argent, described as his "shield for peace", probably meaning the shield he used for jousting. These arms appear several times on his chest tomb in Canterbury Cathedral, alternating with his paternal royal arms (the royal arms of King Edward III differenced by a label of three points argent). The Black Prince also used heraldic badges of one or more ostrich feathers in various other contexts. Opposition to the title While Prince Charles's 1969 investiture was "largely welcomed" in Wales, and it was watched by 19 million in the UK and another 500 million around the world, protests described as an anti-investiture movement, also took place in the days leading up to the ceremony. Multiple Welsh organisations and individuals were against the event, including Dafydd Iwan, Edward Millward, Cofia 1282 ('Remember 1282'), and the Welsh Language Society. On the day of the investiture, a few protesters were arrested. Since then, further prominent organisations and figures in Wales have called for an end