This 2013 dinosaurs medal cover is a Royal Mail first day cover. It commemorates the fossil reptiles from the UK and hosts a medal by the Royal Mint depicting the Megalosaurus dinosaur and ten Royal Mail commemorative stamps of dinosaurs. Cancelled postmark 1822 Iguanodon Discovery Tilgate Crawley West Sussex. Cancelled postmark 1822 Iguanodon Discovery Tilgate Crawley West Sussex 10th October 2013.