Question to the Department for Environment, Food and Rural Affairs:

To ask His Majesty's Government what assessment they have made of the potential impact of (1) improved water flow at the Sunbury lock weir system, and (2) increased river volume capacity that would arise from dredging of the non-tidal Thames below Eton, upon likely levels of flooding and damage to homes and businesses; and whether the River Thames Scheme will be used to achieve this.

The River Thames Scheme has assessed the impact of increasing the capacity of the weirs on the lower part of the Thames, including at Sunbury. Increasing the capacity of the weir will reduce flood risk in the Sunbury Reach and the capacity will be increased as part of the River Thames Scheme.

The River Thames Scheme will reduce flood risk by creating a flood alleviation channel in two sections, increasing the capacity of three weirs at Sunbury, Molesey and Teddington, and channel deepening on the Thames near Walton. Widespread dredging was considered as one of the options during the appraisal phase of the scheme, but it was found to only have a very modest reduction in flood risk and was not an economically viable option.