Thanks Johnny but you already found me an X700 on Gumtree. One just up the road I picked up for under £20. Nice camera.
There's also this one ...
https://www.gumtree.com/p/video-came...ies/1180287370
On a different note, after lots of fiddling, a burnt thumb and some very untidy soldering, the light meter on my K1000 is now working