This is my no dig garden with the cherry tomatoes. I’ve posted this pic in reply to Kate’s request in the comments. So here you are Kate.
I made this garden bed using hay bales as the sides and filling in the centre with flattened cardboard boxes and then a shallow layer of potting mix. I put a sheet of lattice over the top to stop my dog getting into it. I left it on there and it was fine it didn’t cause any problems and definitely kept the dog out!