2(1)No claim, which may be lawfully made at common law by custom, prescription or grant, to any way or other easement, or to any watercourse, or the use of any water to be enjoyed or derived on, over, or from any land or water of the Crown or being the property of any person shall, if the way or other matter has been actually enjoyed without interruption for the full period of 20 years, by the person claiming right to it, be defeated or destroyed by showing only that the way or other matter was first enjoyed at a time before the period of 20 years; nevertheless, the claim may be defeated in any other way by which it is now liable to be defeated.