Hi,
Note that a Sankey trailer is a cumbersome bit of kit to man-handle, even when empty, worse on bumpy ground and even gentle slopes.
I think they weigh about 250kg unladen, so you can buy one with rusted up brakes, strip all the siezed braking mechanism, cobble up a bolt-on, non-braked hitch, and carry about half a ton load, legally .... but check weiegh both your tow car and trailer. A laden unbraked trailer can weight up to half the unladen weight of the towing vehicle., or 750kg, which ever is leastest.
602