The small claims online is a court claim. Did you follow this through , where did you get to in the procedure?
You simply have to apply for judgment using a court form, you are nearly there in terms of getting judgment against him.
There is no fee to pay.
You can ask your local Citizens Advice Bureau for a legal appointment for help to complete the form.
Once to have the judgment you need to send it to him demanding payment within 7 days.
If he pays quickly the judgment will not affect his credit rating so he may pay otherwise there are other ways to enforce the debt.
I hope this helps. If there are any further points please respond and I will be happy to reply .