Yes you can. If there is any fault on the ticket ie. wrong colour, reg, make etc. then the ticket becomes void. The ticket must be an exact match to the car it is placed upon, if the ticket says black and your car is blue (does not matter of the shade) then the ticket is invalid. Phone the number on the ticket and explain you are disputing the ticket, they will tell you to put it in writting to your local chief constable, and he will write back saying sorry for the ticket and you will not have to pay. I know this because i did in in Darlington about 2 months ago and won.