Ok then, well I had a play of it yesterday. It played nice, and the neck felt good/ the tone and feel was very suggestive that it was a mexican fender Jazz. I haven't bought it yet, may well do so tonight.
I noticed one thing, the neck plate was plain, no logo. Do mexican fenders have a logo on the neck plate?
Now the bad ass bridge. Is it usual for a bad ass bridge to be modified as such with holes through the body? I thought they were a direct replacement for the bridge already on it? If it was a standard jazz surely it would have been more work to drill holes....
The seller did say it had been installed in a shop on denmark street, not that he had any verification for it.
edit: i didn't check the ferrules on the back, will do when i look at it this evening.