UPDATE: venue open (pre-booked, existing inducted swimmers only).
Trifarm's 800m supervised swim course, located in Boreham, just outside Chelmsford in Essex, is open seven days a week between April and October.
Location and directions
Sat Nav will take you to the eastern fringe of Boreham. Follow Church Road out of Boreham down toward the River Chelmer, Trifarm is on the left.