There's loads like that here

https://www.richardwestern.com/

https://www.baileytrailers.co.uk/

https://herbstmachinery.com/products/

https://www.hmtrailers.co.uk/

https://www.nc-engineering.com/agricultural-machinery/

https://www.marshall-trailers.co.uk/

That's off the top of my head. They will be fully road legal, lights, suspension, hydraulic and or air brakes etc