I was thinking that in fact the fine was actually a lot more than most similar offences incur. Obviously it should be more anyway.
Fines in magistrates' courts are banded to reflect income.
One might expect Heseltine to be in the highest band.
What probably happened, as often does with wealthy defendants, is he will have declined to fill in a means form.
In those circumstances the magistrates are obliged to assume a high starting point.
That doesn't cost Heseltine anything because he would have qualified for that anyway.
The benefit to him is details of his wealth are not disclosed in court.