The Monkey (Barrington Arms)
I attended first school with lad who's family ran the Barrington Arms back then.
I remember the teacher asking him if he had any idea why the pub was know as "The Monkey".
To the best of my recollection, he explained that inside there was a picture of a chimpanzee hung above a fireplace somewhere and that's why the locals began to refer to The Barrington Arms as The Monkey.
Yes, we know that the chimpanzee is actually a great ape, not a monkey, but that's how he explained it.