Single Line Key Token CAIRNRYAN JCT - CASTLE KENNEDY. Ex Portpatrick & Wigtownshire Joint Railway section. Closed to passengers in June 1965, but the line is still in use for trains to and from Stranraer. The Castle Kennedy to Cairnryan Junction token section came into existence when Cairnryan Junction signal box opened in October 1942. It ceased to exist when Cairnryan Junction signal box closed in December 1962 and the token section once again became Castle Kennedy to Stranraer Harbour Junction.