Hi, update ...
Found a local locksmith, GB Locksmiths, very good guy , Spencer. He turned up, used the boot key barrel to cut a new key, then replaced the EPROM chip on the transponder ECU PCB. Programmed two keys...all sorted! All from the back of his Hiace ..£140.
So...MOT time...I was wrong, Gerald had been parked up for two years...
So... failures....4 tyres (perished) and a front sidelight bulb....that was it! Advisory on rusty discs, which I'll change anyway...
So look out of a metallic green P plate Starlet around south east Cornwall ...yeet!