Watford YouTube sensation KSI has drained the town pond and refilled it with Prime, as part of the hydration brand’s latest publicity stunt.

So much about Watford High Street has changed over the years but the pond is one constant, although it has also undergone a number of alterations to its appearance.

However, today’s change might be the biggest yet after KSI and Logan Paul arrived with work crews at night and drained all the water, before pumping in their popular drink.

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It is unclear whether the pair had permission for the stunt, or how long it will last, but it has already gone viral on TikTok and Instagram with fans calling it “legendary”, “hilarious”, and “absolutely unbelievable”.

Others appear more confused, with one local sharing his concern for the local wildlife.

John Grady Cole said: “How are herons supposed to drink that?”

The liquid appears to be the Lemon Lime flavour as it has turned the pond completely green.

The Watford Observer has contacted KSI’s management and the relevant authorities for more information. Updates to follow.