In-situ measurements from Blagdon Lake from two temperature chains, one made of RBR sensors another with HOBO loggers, with give location, time and temperature. These run from late May to early October at 10 minutes intervals. the rbr chain was located at latitude 51.33858 and at longitude -2.70858. The hobo chain is located at latitude 51.33116 and at longitude -2.688.