Thanks Mandy and Rhys. Mole rats and boar, wow! Puts my cat problem into perspective.
I’ll check out the local Wickes and Aldi. I have seen some by the local garden centre, but since they sell fire wood, I’ve assumed they won’t give them away, worth an ask I think.
As an aside, a shop sent me the wrong sized fruit and veg cage for my currant bushes. They said they’d send the right one next week, and I could keep the wrong one for free. So I have a free 4m by 1m by 0.65m high veg cage for the new raised bed!