Little Friend

If it is a newt then yes it is a friend, they eat slugs.
If it is a lizard (there are two species in Britain) then it also is a friend as they also eat slugs.

looks like a smooth newt to me and as said a definite friend.
they don't need ponds except to breed. they are happy in leaf litter and damp places.

Thank you. Came across three frogs last night as I was on a snail and slug hunt, left a few for the frogs though.