For anyone confused, British people would generally use tonnes (or tons, but maybe not know the difference exactly) and miles.

That's the way they like it. American road signs have mad shit like "No trucks over 15,000 lbs".

They could have said 3300 stones stones ...

I think there's some confusion over the "ton" (2k lbs) and the "metric ton" or "metric tonne" (2k kgs) and 55k lbs is unambiguous.