King Charles is still clearly in high spirits from his Coronation weekend as he beamed while taking up his first role since officially being crowned.The 74-year-old was crowned as Westminster Abbey in London on Saturday in a televised event which was watched by over 20million people across the country. But it was back to work as usual on Tuesday as he met with academics and aviation leaders on a tour of the new facility at the Whittle Laboratory in Cambridge.The monarch was dressed smartly in light grey suit for his visit as he learnt about the laboratory, which aims to accelerate the path to zero carbon flight.