Coolant Leak

Hi Forum

I'm after a few pointers

When walking back to the car I noticed a small puddle on the drivers side

I looked underneath the car and there was coolant leaking from one of the holes in the undertray

I looked at the expansion tank and water level looks OK

I looked at the radiator hoses and these were dry

Any ideas on where the leak could be coming from

The assumption is from the very bottom of the radiator somewhere or a leaky seal on a water pump?

Any general guidance would be appreciated

Thanks