Though it's inside the workshop I've just built a small, sturdy timber bench secured to the floor and walls, and topped with a piece of 10mm steel plate nearly 2 feet square I happened to have.
This too is designed (sort of) on the need for portability and storage of smaller tools.
The plate is screwed to a bench surface cut from 20mm plywood, and is drilled and tapped variously to hold either of two bench-vices, a small fly-press and should I decide to use it there, Drummond manual shaper. Thus any of these can be shuffled about as necessary.
The holes for the press include one of 2 inches diameter, for below that in the press itself; and for the shaper, a one-inch hole for the knee-screw. I cut those with hole-saws, used in a bench-drill. The shaper is already on another bench, but I gave myself the option whilst it was easy to do so.
The bench is a bit longer than the steel plate, to give room for the back end of my steam-lorry to tuck underneath sufficiently to allow the workshop door too close. It is also "semi-detached" with a timber bench that holds a heavy bench-drill, again designed with under-space in mind, for two electric welders each sitting on one of those simple "skateboard" trolleys from Lidls or Wilkinsons.
The drill bench is the same height, so the units are reasonably compatible; and it would be simple to use the vice to hold a temporary rest for long work-pieces on the drill.
I set that height to be right for me, when using the bench-vice. That is almost the first time in all these years that I have ever had the luxury of a bench-vice at elbow-height!