What happens if you cannot afford to pay it maybe food bills makes it unaffordable surely not every disabled driver is well off or able bodied either.
That wouldn’t be viable grounds for an appeal.
That would only work when the baliffs come knocking with the “correct” court applied warrant and you offered to pay by installments, with a mutually agreed payment plan i.e £10 monthly.
However, enforcement in court is still not financially viable for small parking fines but, they do go this rout on occasion, to send a wider picture out they will do it, just to send a message to the wider public.
Unless you are prepared and want a battle along with constant harassment (which is illegal), it’s easier to pay the initial charge.