A 4 m long peat core was sampled using a Russian corer from the centre of the bog (52°30'9''N; 4°0'39''W). Chronological constraints were provided by AMS radiocarbon dating of 5 samples along the core, which showed that the core spanned a period from 4460-120 cal yrs BP. Bromine concentrations, along the core were measured by an ITRAX XRF core scanner at a resolution of 200 µm. Bromine deposited from sea spray is a proxy for storminess.