Sir, As a self-employed gardener, I often have to go into Oxford and work on private gardens.

However the council is dramatically affecting my workload on the grounds that gardeners and others are being warned that by using a visitor's parking permit, we are breaking the law. Unless I have a commercial van with my company name splashed across it, I will never be able to get a trade-parking permit. How is this fair?

D Payne, Kidlington