Free Traffic Legal Advice

Hello, I'm new here, redirected from MSE forum, then from PePiPoo I hope you can help please.

Last year November 2022 I hired a van to move some items to a relative's house in London, as I was leaving the UK for work for 2+ years (I have an empty house in UK which I will return to eventually, meanwhile my credit cards etc are still registered there).
I'm not familiar with London road restrictions apart from the bus/cycle lane rules, congestion charge and ULEZ (I paid congestion charge at the time).
On 14 November 2022 I was driving the van back to Waterloo from south London, to return it. It was rush hour and in heavy traffic on Kennington Lane, I thought I was lost and started looking for a place to pull over and consult the sat nav. It was also very busy with bikes in the cycle lane, so I pulled into the first smaller road I saw, Fitzalan street, 51.492244, -0.111023.
Honestly I didn't notice any signs about the School Streets restrictions, and wasn't looking out for it as I had never heard of it! I carried on my way and never gave it a thought, moved to Asia two days later.
8 months later, yesterday, a friend went to check on my house and found a final notice from a bailiff claiming £514 or goods, and a "warrant of control". I don't know when it was delivered. There is a lot of unopened mail at the house, but I don't have anyone I can trust to check it. I checked my email spam and found a notification from the hire company attached. I then looked up the PCN on Lambeth council and have attached the only info available. I then looked for a CCJ under my name and address, and there isn't one.
I don't think the signage was sufficient (see photos - more obvious signage was provided at the other end of the street; the signs were obscured by a tree on the approach to the left turn). All appeals are impossible now, what can I do? Do I have to pay the bailiff? Why is there no CCJ attached, or does that come after he has visited?
I don't think I can apply to suspend the warrant, because there isn't a CCJ yet, and which court would I apply to? Important not to have CCJ as I need to borrow money soon

Many thanks in advance.
Here's the link to a folder with all the photos. Please let me know if it doesn't work.
https://photos.app.goo.gl/hCBVbj1ZW8EZeqLf8

So what arrangements did you put in place to deal with your affairs while you were away?

Obviously having a friend go round twice a year isn't going to be adequate.

Thanks