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The following were updated or added to the dataset in 2018:

• ESLs of annual exceedance probability ranging from 1-year to 10,000-year return period
• highest astronomical tide and mean high water spring tide conditions for some locations
• ESLs for the full study area coastline at a spacing of about 2km along the open coast or less in estuaries and harbours (enabling rapid selection of appropriate levels without any need for further interpolation)
• advice on generating appropriate total storm tide curves for use with the extreme sea levels
• extension of the dataset in several key estuaries

The following were not updated in 2018:

• extreme swell wave conditions were supplied for CFB 2011 but were not updated for CFB 2018