Many of the remaining defences are now deteriorating in condition. The saltmarsh is eroding, and the long-term sustainability of these defences is in question. Sea levels are also rising; the effect of this will be to increase the risk of flooding and to increase the rate of defence deterioration.

Future flood defence management therefore needs to be considered very carefully to provide the most appropriate level of protection for residential properties, commercial activities and the environment. In order to do this the Environment Agency is undertaking a review of the issues affecting flood defences in the Blyth estuary in order to determine and confirm a strategy for flood management to be implemented in the coming years.