This report was commissioned by the North Sea Wildlife Trusts, Blue Marine Foundation, WWF and the RSPB to assess the extent, scale, distribution, and potential of the current blue carbon sinks in the English North Sea. The focus was to review the current extent and distribution of each blue carbon habitat, estimate the quantity of carbon currently stored within these habitats, establish the average net sequestration rate and estimate the potential net total sequestration of each blue carbon habitat.