If I try to add it going from Cairnryan to Belfast, it attempts to route me to Holyhead > Dublin > Belfast > Cairnryan > Larne > Destination (Northern Ireland North coast) or as an "alternative" route: Cairnryan > Larne > Belfast > Cairnryan > Larne > Destination.
I can't get the route to complete any more (it's saying it can't calculate a plan now). However this is the route I was trying to use (not including my precise address). It's now not completing though - something to do with the issue with the Cairnryan > Belfast ferry route I assume.
Thanks in advance for your help with this.