I bought some insect breeding "cages" for my sister who used to lose nearly all her seedlings to slugs and was almost on the point of giving up. Now, slugs and snails are not a problem. I have never had a slug or snail problem. Blackbirds are the vandals I have to put up with. Pulling up seedlings in their attempts to find worms in their pots. Add to that freak hail storms, one of which wiped out all of my potted seedlings within an hour this year!

So I bought some for myself too. They have one transparent plastic side which, if facing upwards, might just keep the hail off. The netting will keep the birds off, for sure.
I think I bought mine here:
https://www.ebay.co.uk/itm/393532140270?hash=item5ba057eaee:g:MVUAAOSw6xZe4FBKI remember being surprised when mine arrived to find that each pack contained one small and one medium cage for the price. I wouldn't like to inadvertently mislead people, I may have given a link to a different vendor, so shop around. There are lots of alternatives on ebay.