Knowing how local authorities get things so wrong with motoring ‘offences’, such as at Lendal Bridge in York:
https://www.bbc.co.uk/news/uk-england-york-north-yorkshire-28270571
or the John Dobson Street bus lane in Newcastle Upon Tyne:
https://www.bbc.co.uk/news/uk-england-tyne-53810808
Then, have to refund all the motorists they ‘fined’ incorrectly, it could well be more of a financial drain on local authorities than a ‘cash cow’!