whilst travelling to work today i had to travel on a 3 mile dual carriageway. i was travelling behind a police van doing approx 65/70 mph. i though the speed limit on a dual carriageway was 70 mph so stuck to it. Anyhow i see a police saftey camera van further up the road so dont go over 70. i was doing about 65mph just to be sure. Ive just checked the highway code and it says i should only be allowed to do 60 mph in my van (its a renault traffic) so if they play it by the book i might get a speeding fine through.