3. Celebration of the purchase of the Thames conservancy in 1197, July 22, 2021
On 22 July 2021, the Wardens, Clerk and I joined the Lord Mayor and Lady Mayoress at Mansion House to commemorate the purchase of the River Thames conservancy by the City of London in 1197. The cost, 1,500 Marks – about a third of a ton of silver, gave the City control i.e. the ability to rent or tax all users of the River. This arrangement continued into the 19 th Century when the Thames Conservancy was established. Estuarial management was transferred to the Port of London Authority in 1909. The Celebration includes the presentation to the Lord Mayor of an engraved jug filled with tap water.