Britain's Queen Elizabeth II stands after signing a visitor's book during her visit to the Defence Science and Technology Laboratory (Dstl) at Porton Down science park on October 15, 2020 near Salisbury, England. The Queen and the Duke of Cambridge visited the Defence Science and Technology Laboratory (Dstl) where they were to view displays of weaponry and tactics used in counter intelligence, a demonstration of a Forensic Explosives Investigation and meet staff who were involved in the Salisbury Novichok incident. Her Majesty and His Royal Highness also formally opened the new Energetics Analysis Centre.