Unfortunately as we were very short on time the only option was to speak with the Prosecutor on the day. As the Rev P Manager had informed me of this I confirmed what time I'd be arriving and so they were expecting me. I happily paid the costs. It was dreadful timing but the alternative would have been much worse as I really couldn't risk anything negative on a DBS check.
Thanks! It's always good to receive confirmation that settling-on-the-day can work: we have several people who come to the forum days out from a court apperance and it's useful to advise that this is an option.