Fair enough to get a 70s MIJ Precision for £69 (total bargain) but I can tell you in no uncertain terms it's nothing to do with Ibanez. That style of logo was never used on 70s copy-era guitars, and the neck plate style with the MIJ stamp on the upper half of the plate was never used by Fujigen Gakki, the factory which made 70s Ibanez. That neckplate style could point to Chushin Gakki, or possibly the Matsumoto City manufacturer's co-op Matsumoto Gakki Seizou Kumiai.
That bridge is not what I'd expect to see on an MIJ P copy, so it's possible it's not the original, or might even hint that the bass is a bitsa. Some clear, detailed pics of hardware might help clarify things, but back then there were a lot of different factories making pretty similar/generic Fender copies, which were frequently sold unbranded, so it's unlikely we'd be able to pin down exactly what it is. Always cool/interesting to see though!