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. 😂

Move

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

I would set the lot on fire

Relocate.

Are they 'slow worms'?

I'm not afraid of sneks

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