 Three World War I phosphorus grenades on 20 April and an unreleased number of anti-tank grenades were destroyed on the 24th .The area around the Tesco Express Middleton Road, Grimsbury, witnessed the disposal of several lost pieces of World War I ordnance that remained buried after the closure of the local ammunition testing range.They were reckoned to be part of a batch of 20 that were lost in 1919. .