Sir, Christopher Gray doesn't have to go as far as the Guardian and Nescafe to find howlers (Gray Matter, April 28). Seen on dozens of signs put up across Oxford's park-and-ride car parks: "Overstaying will be enforced". Funny, I would have thought they'd want to discourage the practice of leaving your vehicle there for days on end, never mind enforcing it; and indeed, elsewhere they specify a 48-hour limit. At any rate, despite talking big, so far they have failed to enforce any overstaying in my own case.

As to Mr Gray's comments on the BBC's shameful persecution of poorly-paid licence non-payers, while paying obscene salaries to 'presenters' entirely devoid of talent or any other redeeming traits: more power to your elbow. The BBC's hierarchy is essentially sticking up a finger to the terms of their Charter, having become a commercial empire intent on abusing its unjustified special position. And the politicians are too spineless to do anything about it.

John Kinory, Steeple Aston