The interim report, which was commissioned by the city council, revealed that  flood protection systems and drainage plans were designed based on major flooding happening once every 30 year and concluded that this may not be sufficient for low-lying cities like Hull.

The report highlighted problems caused by different agencies - including the Environment Agency, council and water companies - responsible for different areas of the drainage, which are likely to replicated across the UK.

And it urged the Environment Agency to look at expanding its flood warning system from just river-based flooding to other kinds of potential deluge.

The report, however,  rejected a common view voiced by many local residents that the flooding was caused by blocked gullies in the city.

The report concluded: "The floods on June 25 were caused by Hull's pumped drainage and sewerage system being overwhelmed by the volume of rainwater. This led to backing up of water along the sewer and drainage network leading to widespread flooding across Hull."