Motorhome Maximum Technically Permissable Laden Mass (MTPLM) = 3300KG
as far as I can work out - it would not be legal to cross a bridge marked with a 3 ton max weight limit
- law relates to plated weight of vehicle not actual weight
- bridge figures are in UK aka long tons
- 3300KG = 3UK tons 555.25lb = 3.248 UK tons
sound right to you ?