Claim: One of Thurrock's seven conservation areas, which is located in England, under the sovereignty of the United Kingdom, is the town of  Purfleet.
Evidence: Thurrock (/ˈθʌrək/) is a unitary authority area with borough status in the English ceremonial county of Essex. There are seven conservation areas, 19 scheduled ancient monuments, including the dovecote at High House Purfleet, and 239 listed buildings. The borough contains ten sites of special scientific interest: Purfleet Chalk Pits Purfleet-on-Thames is a town in the Thurrock unitary authority, Essex, England. Purfleet is one of seven conservation areas in Thurrock.