Thanks for the responses. I remember the TV picture being in monochrome until a capacitor was soldered across two pads in the video circuit of the Beeb. When in colour the picture was still a bit poor. We solved our bad pictures by recycling a video monitor out of a pub table video game bought cheap at a sale.
If the scart option is a goer I can knock up a cable to do the job, I have the parts in my junk box. I have a tv with scart input, I wonder if any of our spare monitors have scart?
Rans6.........