Paul Pearson of penaltychargenotice.co.uk, which fights "unfair" tickets, claimed unscrupulous attendants would be encouraged to cheat. He said: "If a warden sees you pause on a yellow line for just a few seconds while you check a map, he will consider you fair game for a ticket. All he needs is your registration number. "What defence will the driver have? By the time you get the ticket in the post, how can you possibly remember the circumstances?"