Berkhamsted
The Boat is a great pub, right on the canal, and serving superb food (oh my... try the burgers or their roasts!!) and beers.
If you're heading this way on a weekend, especially in the summer, it's worth trying to pre-book a table, especially if there is a few of you as they do get busy. They have quite a lot of seating inside but the outside terrace with views along the canal is where you want to be if the weather is good enough.
Gravel Path,
Berkhamsted,
Hertfordshire,
HP4 2EF