The Queen’s Diamond Jubilee street party turned fatal yesterday as a two-year-old boy was mauled by two dogs believed to be Staffordshire Bull Terriers. A 49-year-old man was also injured as he tried to pull the animals off the boy, who was later airlifted to hospital. Police informed they seized the dogs following the incident, which caused panic in a back garden in the Swanage Walk area of Moredon in…