The study tagged 22 European barbel (Barbus barbus), sampled by a combination of electric fishing (n = 12) and rod and line angling (n = 10), and all were captured within the River Teme. Vemco V9 tags were surgically implanted. The study area was downstream of Powick Weir (River Teme; 52°10’N, -2°14’W) through to the confluence with the River Severn, and then in the River Severn between Diglis Weir (upstream) and Severn Stoke (downstream). An array of 14 fixed receivers (VR2) were deployed in this area, including upstream of Powick and Diglis Weirs to test whether these were passable.