A new text service has launched that offers an interesting public service...

The "SatLav" service promises to tell you where the nearest public toilet is in the City of Westminster.

The somewhat geographically limited offering covers just 8.5 square miles but claims to cover "nearly every" popular shopping and socialising district within that area.

A text message to 80097 with the word "toilet" will mean a text back to you with details of the nearest facilities and their opening times.

The "SatLav" mobile phone service costs 25p for each text, with Westminster city council chiming in with 9p each time to cover the cost.

Westminster council said its aim was to make a "substantial impact on reducing street urination".