You might want to check your expectations on car sizing. The Zoe is bigger than the 208. And the ID.3 Is only a little bit bigger than the Zoe.
If you want a larger car at the lower price point you would be looking for the Hyundai Ioniq or Citroen C4. Hyundai wins between the two in terms of value and range/efficiency especially as we approach the winter again.
Or you may well find that the Zoe is actually big enough after all, depending upon what you want it for. It always is a little bigger than people first expect it to be for some reason.
Cars come and go all the time. Keep checking multiple times a day, and be ready to strike as soon as you see something. Get it booked immediately. It’s only £49.50 to swap so might be worth taking anything suitable even if it’s not your first choice of color for example, just to get you on the road sooner. Then less pressure to swap once a new car joins the fleet which you can swap to at your leisure.