I would set the lot on fire

They look like baby black snakes, or some variety of garden snake. They would be perfect! I would hire some guy to box them all up and deliver them to the ex. Snakes are his fave. 😂

I would catch them and release them into the nearest gully so they can eat the mice.

I'd go back inside. And..lock my doors

Are they 'slow worms'?

Move

I'm not afraid of sneks

Relocate.