Olsten Trout Farm in Lincolnshire began in 1982 as a cage rearing unit in gravel pits. We then expanded onto a river system on the edge of the Lincolnshire Wolds, with a farm 600 metres from the source of the River Long Eau. The water is of a very high quality usually flowing at a constant 9.5°C, warm enough to give constant.... read more on our sister site at OlstenTrout.co.uk