This place was just delightful! I had heard about it from wasleys, who posts on this forum, and it was such a wonderful place to stay. I had a very charming single room (with an extra wide bed), dresser, lovely window, TV and private bath. The double rooms were ensuite. Everything was pristine and looked very new. Kate and Ian (the owners) told me later that when they bought the place, they did a huge renovation. There is a laundry room that guests are allowed to use at no extra charge (washer + heated drying rack). And there is a very large common area with lots of comfy seating, TV, tons of books, and travel maps.
The owners were so friend and so helpful. Kate would leave some kind of homemade pastry or cake in the guests’ rooms each day, ranging from walnut cake to a chocolate muffin. Kate and Ian also drive guests who have no car to wherever they need to go. A lot of their visitors are walking Hadrian's Wall, so they take them to the next section. Breakfast was included and was delicious, and there was parking available on the property.
The town of Haltwhistle itself is an excellent location for exploring Hadrian's Wall, as is sits pretty central to most of the sites. There are some nice restaurants in the town itself, and a Sainsbury grocery story that was a block or so away from the B&B. I ate at both the Manor House and the Black Bull and had excellent meals at both. I stayed there for 3 nights and it cost £240. I would love to stay here again.