Tilbury Fort | English HeritageSpend a great family day out at Tilbury Fort in Essex. Explore the magazine houses or the bastion magazine passages of this fort on the Thames estuary that has protected London’s seaward approach.History-making days out from £7.50 per adult Tilbury Fort on the Thames estuary has protected London’s seaward approach from the 16th century through to the Second World War. Henry VIII built the first fort here, and Queen Elizabeth I famously rallied https://www.english-heritage.org.uk/visit/places/tilbury-fort/