Craig's Bond is not a martial arts expert, just an overwhelmingly quick, athletic, and resourceful operative who uses his environments and his strength to overpower his opponents. The Slate fight is the best example of this, with Bond making use of the glass partition, book, shoe, and scissors to subdue his assailant. There is hardly any formal fighting used in that exchange, just solid reflexes.
I thought I had detected some pretty advanced Wing Tsun in Craig's fights. The close contact held over the entire scenes to me speaks of that, although I may be wrong there. Anyway, looks pretty advanced to me.
As for Fleming's Bond, he knew Judo, and was looking to write a book on the matter, so surely he had a sound knowledge of the subject. He seldom had to put it to use, but it was within his power to utilize it when needed. That is how I felt about Brosnan's Bond.
I think Bond wanted to put up a compilation of various services' textbooks on close quarters combat, IIRC. Putting together the best and most practical techniques from the point of a field agent. Judo didn't feature in the project as far as 'Goldfinger' mentions. But 'Goldfinger is the source for another vital piece of information:
Goldfinger: 'I can tell you that if Oddjob the appropriate single blow on any one of seven spots on your body, you would now be dead.'
Bond: 'That's interesting. I only know five ways of killing Oddjob with one blow.'
Apart from Bond's usual show of confidence and bravado, this fits the general impression of Bond as having undergone some commando training that's chiefly based of bludgeoning an enemy's skull as fast as possible, no holds barred, no finer points of any martial arts concerned. Also interesting here: the technique mentioned is 'blows' while Judo on the other hand for the most part is based on throws, grappling techniques and grips.
But Bond's alleged judo expertise is also questionable in light of one other circumstance, his encounter with Tiger Tanaka. Tanaka is a former kamikaze who only was alive because Japan surrendered in time. But Tanaka was also a black belt of the seventh dan with a prospect of becoming one of the highest judo practitioners of the Kodokan Academy. The matter is discussed at some length and detail, yet Bond doesn't mention with one single word his own experiences. To me this suggests he's only ever had a very passing and brief dabble into the world of judo. Probably deeper than a white belt but hardly with a more versatile knowledge, most likely concentrating on the most effective moves, grips and throws.