You can find a route map and further information here:

http://www.discover-normandy.info/no...rry_routes.htm

There are no links to the operators' web sites but it lists their names so they should be easy enough to find.

Ferries go to Poole, Portsmouth and Newhaven which are all on the rail network; Newhaven and Portsmouth have stations with "Harbour" in the name which probably means that they are within walking distance of the ferry terminal. Hopefully someone from nearer the South Coast will be able to confirm this.