Trace metal contamination of Beaufort's Dyke, North Channel, Irish Sea: A legacy of ordnance disposal

► Our samples are the first trace metal concentrations taken from the valley of Beaufort's Dyke. ► There is no clear trend between concentrations of trace metals in Dyke and NMMP sediments. ► Particle transport simulations show dispersal of trace metals from Beaufort's Dyke is possible. ► Disposed ordnance may also contribute to contamination of surrounding areas. ► These methods could help predict areas at risk of future trace metal contamination as a result of ordnance disposal.