If you are in Ireland, you can even choose to reach Liverpool by ferry, with the advantage that this time you can carry your car with you (if you have one, or need one). Liverpool is connected daily both to Dublin and Belfast and it takes 7/8 hours to reach your destination, with favourable weather conditions. When I did my Dublin-Liverpool crossing, the sea was so rough that we had to reach another location on the English coast and then travel by bus to our home. Luckily I’m not sea-sick!
When you finally get to Liverpool, your landing point might very. If you’re coming from Dublin, you’ll land at Brocklebank Dock, which is north of the centre, so, if you do not have a car, you’ll need a cab or a bus to get to your final destination. If you’re coming from Belfast, you’ll actually land in Birkenhead, just on the other side of the river Mersey, opposite the famous Albert’s Dock. From here, apart from the usual taxi or bus, you can reach Liverpool via ferry (again! But this time you travel with MerseyFerries) or train from the nearby Birkenhead Hamilton Square rail station.
For info about timetables and fares, you can check both P&O Irish Sea Ferries and Norfolk Ferries.
