My sister went out with a group of friends - 5 of them in two cars - a few weeks ago and parked in a car park where they thought they had 3 hours free. Turns out the car park had changed it's policy since they had last been there and they only got 2 hours free. Both cars have received parking "fines" - invoices from a parking company. My sister (passenger) has offered to split the fines 5 ways as none of them knew it was only 2 hours. The drivers are saying that they trusted their friends telling them it was 3 hours and so didn't check the signs - haven't said in so many words but we think are trying to get out of paying. Who is right?