A slick of diesel spread across the River Thames on Saturday night after a small boat moored at Festival Pier sank.
Officials from the Port of London Authority rushed to the scene to deal with the incident on the eve of the biggest event on the river in modern history.
• If you know the identity of the submerged vessel, please let us know.
• Follow us on Twitter for updates on the pageant and other Diamond Jubilee events in and around SE1.
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