jon ironmonger reports.ool lime street station this morning, the starting point for thousands of racegoers travelling to grand national day. so if you are off to aintree on the train, you can expect some problems. the rmt union says support for strikes on merseyrail and northern is rock solid, with widespread delays, packed or cancelled trains and replacement buses likely across all services. to limit the disruption, merseyrail has laid on a special timetable to and from the course, but other routes could be hit as a result. northern rail says it has moved the times of its last services from lime street to later in the evening. the strikes, about the role of the guard on trains, began on southern rail a year ago, and has spread to companies in the north of england in recent weeks. southern says it expects to operate a near normal service today because more of its trains can run withjust a driver on board. so far, talks to try to resolve the dispute have broken down. jon ironmonger, bbc news. let's get more i