Assuming you’re on an industrial estate, someone nearby will have one, no harm asking to drive on it, have a look at the weight, then eff off out of their way, 60 seconds max, no harm done. Recycling/Waste facilities are usually pretty relaxed about comings and goings like that.
Inside the vehicle will be the VTG6 “Ministry plate” showing your GVW, that’s the total limit for the vehicle, including with you on board and fuel etc. The tare weight (ie vehicle minus load), you normally make a mental note of after getting tipped .