This is a mystery siren since it sounds like a GP12 and seems to have the motor of a Secomak siren aswell. Ireland seem to have these sirens but the name of them is unknown so I will probably class this as an Irish siren.

This siren is tested every Friday at noon (12:00pm)

Hope you enjoyed the video, and huge shoutout to the guard who let me film this 🔊😁