King Charles has featured in a surprise birthday tribute to David Attenborough , with a cast of wild animals helping to relay his handwritten congratulatory centenary card. The whimsical film, A Very Special Delivery, begins with the king writing his tribute in the library of Balmoral Castle. Charles, wearing an animal-themed tie featuring elephants, reflects on more than 60 years of friendship with the renowned naturalist. King Charles enlists creature couriers to congratulate David Attenborough on his 100th birthday As he writes, Queen Camilla’s rescue dog Moley scampers around his desk. The signed card is then borne on a silver salver by a butler to a waiting Land Rover. But disaster strikes. A fallen tree blocks the vehicle and what unfolds is a rescue mission by a roll call of heroic animals. Flynn the border collie leaps over a fallen tree as it takes off with the card.…