They would not accept money in the court itself, as they would have no means to issue a receipt.
the court office would accept cash, but they could only do that once they had the details of the judgement in the court records.
if I remember right, your drink drive case was 30-40 years ago. I am sure today with everything electronic if you were fined and went straight to the court office they would be happy to accept cash or card for payment.
here is the guidance for paying a court fine. It says pay-court-fine-online but the same applies to payment in person.
no one is, or ever has been, required to pay in installments unless they request it. The standard solicitor quote to the magistrates is: “my client would like 7 days (or 28 days) in which to pay the fine.“ it is always granted.
the Court procedure for paying fines is nothing to do with Magistrates, they are lay people who give their time to hear cases. HMCS are responsible for running the courts and the back room processes so it is unfair to label Magistrates as “thick and stupid for something you say happened but is nothing to do with them......
even if you were “ordered to pay in instalments” there would be nothing to stop you making the full payment on the first “instalment”! They would be delighted with early repayment........
How to pay
You need your ‘notice of fine’ and a debit or credit card. If you’ve lost your notice of fine,
contact the court where you received the fine.
The only service you can use to pay your court fine online, or by telephone using a credit or debit card.
www.gov.uk