My mum used to put beer traps in for the slugs, a little plastic cup or cut off bottom of a plastic bottle buried up to the rim, half filled with beer. The slugs fall in and drown. There is a win-win to this because hedgehogs are in decline so imagine how they will thrive on a diet of slugs marinated in beer......it'll be party time in the garden!
The Archangel
My mum did that too! Also empty butter containers for cockroaches.....all worked a treat!
A touch of Dettol will kill a toad too.