> You could travel from Harwich to Hook of Holland or Newcastle to Amsterdam, Hull to Rotterdam.<br />
I would only recommend the Harwich/Hook crossing. the kennels are lovely, you have free access to them, entry via pinpad so they are secure. You also have free access to an exercise deck (right next to the kennels) where they can even be off lead to go to the loo. Then you can lie in bed and watch your dogs on the cctv on the tv.
Hull to Rotterdam is too long a journey, the kennels are disgusting, not surprising given the length of the journey. You can book a time to visit and you're escorted to them and then have to walk for ages up and down narrow stairs to an exercise deck.
Coming from Scotland it's an extra 4 to 6 hours to drive to Harwich for me (depending on traffic and breaks) but well worth it as the ferries are so nice and so comfy for the dogs.
The first time I travelled Harwich to Hook, about 9/10 years ago I was concerned that you had to go down a flight of highly polished wooden stairs to the kennel deck. It's a lift from the car deck then down one flight of stairs. I complained later to the company and the next time I travelled with them the stairs had a non slip coating. It used to be a room for big dogs and room for little dogs but they changed a couple of years ago to two combined rooms so nobody had to lift a big dog into the upper cages.