Hmmm. That ain’t good. Just shows how unreliable the British justice system can be at times.
Dunno if it’s possible, but it might be worth asking around at court to see if any solicitors there have a spare 10 minutes, even if it’s just to give you another perspective. My mate was up on a driving charge a few years back and was going in fighting his own corner. He was guilty as, by the way. By pure chance, some guy’s solicitor was hanging around cos his client hadn’t shown up and my mate got talking to him. He stepped in gratis as my mate’s defense and probably lessened the punishment.