Footage from Staines, England, filmed on Monday 13 July 2026, shows the Vintners' and Dyers' livery companies rowing traditional skiffs along the River Thames, catching cygnets, weighing and measuring them before King Charles' Chief Swan Marker, David Barber, released them back into the water near Windsor Castle. The event, called Swan Upping, is an annual census of the Thames mute swan population running from 13 to 17 July, from Sunbury Lock in Middlesex to Abingdon Bridge in Oxfordshire.