On Sir Keir Starmer's street in London, a boat bearing pro-Reform slogans has been left.

The ship is carrying posters urging people to support Reform UK and alleging that the leader of the Labour Party is preparing a "Ulez cash grab across Britain." It's unclear if Nigel Farage's party was involved in any way with the stunt.

It was abandoned in a parking spot on Sir Keir's street on a trailer.

According to what report is aware of, the police have been notified that the incident was intimidating.

Words on the boat reference the Ultra Low Emission Zone (Ulez), the charging scheme for high-polluting vehicles which Sadiq Khan, the Labour mayor of London, has rolled out across the capital.

“Labour will spread Sadiq Khan’s Ulez cash grab across Britain,” it says.

The boat carries the name HMS Toolmaker – a reference to Sir Keir’s frequently repeated line that his father worked as a toolmaker.

It also carries a quote attributed to Angela Rayner, the deputy Labour leader: “This (Ulez) isn’t just about London. This is coming to towns and cities across the whole of the UK,” it says.

A slogan on the keel of the vessel says: “The tide is turning, vote Reform.”

It is not clear who left the boat on the street.

When Labour was laying the groundwork for its manifesto last year it initially said it supported Ulez-style “clean air zones”. However, following the party’s defeat in the Uxbridge and South Ruislip by-election in July 2023 – a loss which was widely blamed on Mr Khan’s expansion of Ulez – the commitment to rolling out the zones was ditched.

In the wake of the by-election result, Sir Keir said Labour had to “face up” to the electoral damage caused by the policy.

Sir Keir has previously faced protests outside his home from Just Stop Oil and from pro-Palestine activists.