Pembroke House is well situated on the Woodstock Road and just a hundred yards (or so) from the ring road that brings the traveler up from London. Its other advantage is that the bus into central Oxford stops immediately across the street and returns you almost to the doorstep. The white house sits behind an equally white wall with a rather diminutive sign (you'll need good eyes for the sign) proclaiming simply, "Pembroke House"...no indication that it is an extremely nice B&B. There are three levels of hospitality here beginning at a double-bedded room at 50 pounds and going to the Master Suite at 80 pounds. Either by luck or misadventure, we stayed in the Master Suite. Taking it as a positive omen for the rest of the trip, I couldn't have been happier.
The master suite is large and comfortable and French doors overlook a garden that must be beautiful later in the spring. Apart from a large bed and seating, it features an eating area and a fully equipped bathroom.
The host, who lived downstairs, was extremely congenial and delivered a huge breakfast in the morning and as were all our hosts on this trip, a font of information on how to get around. To see pictures and a map, go to smoothhound and go to Oxford.