Update

Found a image I think from the pilot. https://i.pinimg.com/236x/67/b8/f8/67b8f8b31018bff98e4708a9ef478105--childhood-friends-paradiso.jpg

This was hard to find.

Also I found the An Vrombaut YouTube channel but most of the videos don't play. when I put the link in Wayback machine the error message appears. link to YouTube channel - https://www.youtube.com/@AnVromb

Also I found An Vrombaut website page most of the stuff is missing but if we have a little help by Wayback machine the page is working fine the only problem is some videos don't work even using Wayback machine don't help the situation. If you type this URL http://www.vrombaut.co.uk/64-zoo-lane-a-sort-of-anniversary/ into wayback machine you will go to the anniversary page of the 64 zoo lane. The page talks about how An Vrombaut created 64 zoo lane.

Also there is a image of a drawn tortoise drawn by An Vrombaut when she was five here is the image - http://www.vrombaut.co.uk/wp-content/uploads/2013/03/tortoises.jpg she also said Quote "Firstly, my TV series would have animals in it. I grew up in a household with lots of pets, so animals are what I enjoy drawing the most. Here’s a drawing of a tortoise I did when I was five. Can you see the resemblance with Toby from 64 Zoo Lane?"

Anyway I hope this helps the mystery.