GREEN leader Zack Polanski apologised today and admitted he may have failed to pay the correct council tax while living on a London houseboat.

Mr Polanski had faced mounting questions over whether the houseboat, moored in east London, was his primary residence. 

The party originally said he only stayed on the boat “occasionally” before issuing a late-night apology on Monday for what it called an “unintentional mistake.”

A Green Party spokesperson said: “Until relatively recently, Zack was living on a houseboat, which came with its own unique practical circumstances and considerations. 

“He has immediately taken steps to pay any council tax he may be found to owe. Zack apologises sincerely for the unintentional mistake.”

The party added that for security reasons it does not comment publicly on Mr Polanski’s address, noting that two serious recent incidents had been reported to police and were under investigation.

Mr Polanski has overseen a surge in Green support since taking over as leader last year, but has faced increasing scrutiny over past statements. 

Government guidance states that a person may be liable for council tax on a boat if it is their “sole or main” residence.