Check out this offer from www.Tallships.org . It's for one week, from Liverpool to Greenock from 23rd to 30th April 2013 on Stavros, a 200-foot tallship. There is a fuel surcharge of about £45 and then the cost of train fares and a few beers - but still cheaper than staying at home I'd have thought!  http://us2.campaign-archive2.com/?u=fd45c959ca3a2babd982c392a&id=b1644a84f1&e=00a3dcd5ec