I wouldnt swear to it but i think this is the timber yard which is halfway between watlington and benson. - we drive past it quite a lot (hence recognising the owners name) but have never bought owt there.
if its not been stored in stick i would be very dubious of the quality for carpentry , but it might be worth a look for the turning fraternity who are much more able to work round spits and twist.
I would check it out but a) i am too busy getting married this weekend , and b) thanks to mikes magical oak sale i have enough oak turning blanks to keep me busy for the forseeable future
btw if anyone is thinking of checking it out watlington is nowhere near oxford - it is accessed by leaving the M40 at J6 and going south about 7 miles.