The prosecution have to prove your unladen weight was above 3050kg.
Maybe that is why we do not have many reported cases of convictions.
Just file it in 'Pending further investigation'
Was it really nearly 9 years ago that I got that first motorhome and joined MHF? It must have been one of my first posts. I am still here so MHF must do something for me but I realise how naive I was in those days. Anyway 4 motor homes later, of various weights and sizes, I have never had the need to prove the ULW of any of them.