In any case I noticed an ALDI (never heard of them before) across the road, so I popped in to have a look at their products.
Well they have some cheap kit in there! One of which was this all-metal suction vice (£5.99). They also have the clamp base version, but my hobby desk won’t allow for it. 70mm jaw width, ±155mm high X 150mm base width.

I was previously looking at this plastic one from Maplin for £4.97, Screwfix sell a very similar one (it looks the same to me) for £12.99 (go figure).





 




















