I want to get a ticket from Salwick Station to Preston to catch a train to London. Salwick is convenient but has very few trains stopping (lots passing). The National Rail website lists a 15:55 going away from Preston to Kirkham and then from Kirkham back to Preston in good time for my onward train. But I can’t find a single online site that recognises that option. They only give the direct trains and if I put in Kirkham as a via point it says no trains. Is there a reason for this and will I be able to buy one at Preston Station. Also if I buy e.g. a Preston-Kirkam return getting on at Salwick is it an officially recognised connection if the first leg is delayed and I miss my train. I assume because its in the National Rail listing it is but that seems to be the only place it is.