2026 Joint Nature Conservation Committee (JNCC) Data results from the pilot assessment based on the indicator “Sentinels of the Seabed” in the Celtic Seas and Greater North Sea used in the UK Marine Strategy Part One 2026 update dataset https://portal.medin.org.uk/portal/start.php?tpc=010_c7aba887-aa93-4074-9ec4-c175677c655f Data results obtained from the calculation of the “Sentinels of the Seabed” indicator. This indicator assesses the environmental status of a habitat using the proportional abundance of the sentinel species across pressure gradients. Sentinel species are taxa characteristic of a habitat in reference condition that are particularly sensitive to the pressure assessed. Species sensitivity to trawling was estimated using the BEnthic Sensitivity Index to Trawling Operations (BESITO). Changes in the proportion of sentinel species across a pressure gradient are used to calculate pressure-state curves for two main purposes: 1) identify tipping points and boundaries for habitat condition and 2) estimate habitat condition