4. If in consequence of or in connection with the exercise of the powers of this Order any part of a towing path or any public right of way giving access thereto (“the closed section”) is temporarily closed to persons on foot on cycles or in a wheelchair and there is no way which provides a reasonable alternative, the undertaker shall, to the reasonable satisfaction of BW, provide in substitution a sufficient and convenient way for such persons between the points of commencement and termination of the closed section for such time as the closure continues.