Southampton Blue Light Run

[@HampshireFireService]

That's the sound of the indicator buzzer for that particular model of fire appliance.

[@HampshireFireService]

@BlueLightVids This was a Driver Training appliance driving a route through St Mary's fireground.

[@falcon9278]

What was the bleeping sound that started around half way through?

[@ChrisWrightpmq]

Yellow truck doing exactly what you are not supposed to do..... (A) Pull out on an emergency vehicle and (B) Panic and pull up fast, when realising an appliance was bearing down on him.