On all rivers it all comes down to your local bylaws. In other words its purely up to the riparian owner and the lessee. Nationally it is against the law to fish for coarse fish during the closed season, but if an agrrement has been made between the riparian land owner and the lessee (club or tenant) for trout fishing either by fly, lure/spinner or worm, then that is permitted. If in any doubt check with the owner of the angling rights. DON'T just rock up and assume its ok, because if you are in the wrong you will be prosecuted.