Your item "Speed cases flawed" (The Argus, February 28) reminded me of another, and perhaps more significant, defect in the system which catches speeding motorists.

Recently, either my partner or I was driving our car marginally above the 30mph limit.

I received the notification of the offence some weeks later.

I was the registered owner, I must have been driving.

I asked if the photograph that was taken of the offence being committed indicated which of us was at the wheel.

I was told the photo was of the rear of the car only, with the focus on the numberplate.

This raises an interesting point.

In law, one is innocent until proven guilty. My argument that it was up to the authorities to prove that one or other of us was guilty fell on deaf ears.

Surely, that requirement should obtain here too?

Or, if they insist on this breach of common justice, they should demand only that the fine is paid and skip the endorsement of the driving licence.

-Dr MBJ Johnson, Brighton