You can get information about rental equipment and permits at the following for Ullswater , the Pooley Bridge and Glenridding tourist information centres ; for Bassenthwaite Lake , the National Park Information Centre in Keswick ; for Coniston Water , Coniston Gifts and Sports in Coniston ; and for Derwent Water , the Keswick Anglers Association .
It is very difficult to obtain a permit at certain times of the year .