OH wow! They are really good. I bought some tradesman style fold-ups earlier this year and I like them very much although if you are not careful they can slice your finger(s) of on opening/closing them I think.They are the sort that fold up into a box about 2 feet high but once assembled the bit you put stuff on can be raised up to quite a height.
I'll find a link and put it up.
https://www.manomano.co.uk/p/homcom...c-builders-diy-steel-work-bench-tools-2208319
https://www.tools4trade.co.uk/excel-steel-sawhorse-heavy-duty-twin-pack-1178kg-capacity.html
But they are incredibly versatile and very strong and fold down completely into the top cross-beam of the trestle and can be slung into the back of your truck.