Official assessing formal complaint into Green party leader’s potential ‘breach of conduct’ as assembly member

London assembly officials are weighing up whether to launch an investigation into Zack Polanski after he admitted he may have failed to pay the correct council tax while living on a houseboat in the capital.

The Green party leader has faced questions over whether the houseboat, moored in east London, was his primary residence. A spokesperson for his party had described the situation as an “unintentional mistake” and said Polanski had “immediately taken steps” to pay any tax owed.