Yep, and what is worse, four seperate tetrads! If you are walking around the broad, the significant points are the boathouse on the western shore, and the bird hide on the northern edge. Goinmg anti-clockwise: Everything from the boat house, round past the teashop and up to the point opposite the bird hide is TG2507 (TG20N), From there to the point on the eastern shore opposite the boat house is TG2607 (TG20T), then TG2608 (TG20U)to the hide, and from there back to the boat house is TG2508 (TG20P)