Guy on YouTube has a good way of combating the critters.
He sprouts the peas in a half pipe and when they are sprouted he slides the wholel lot into the garden.
Pulling the pipe as he pushes the sprouted peas out.
The channel is called allotment diary.
Lots of good information.
https://www.youtube.com/channel/UC7L...sSfIgLDa_Sj2ZQ