Off to France, Belgium and Netherlands. Our Swift escape 686 motorhome has a revenue weight of 3650kg gross. Does this mean we are over 3.5t. Getting confused with conversions. If that's the case does that mean for example on a French motorway do only 110Kph as against 130kph? In the UK then our mass in running order shows as 3054kg . On the UK gov speed limit site https://www.gov.uk/speed-limits a motorhome Motorhomes or motor caravans (not more than 3.05 tonnes maximum unladen weight) 30 (48) 60 (96) 70 (112) 70 (112) Motorhomes or motor caravans (more than 3.05 tonnes maximum unladen weight) Confused? Are we allowed to drive at 70 MPH on UK motorway or 60MPH. HELP?