Wessex Archaeology’s Sheffield office had their white roses at the ready for the Yorkshire Day Celebrations at Pontefract Castle on Saturday 1 August 2015. The busy summer season for the community team continued with another outing for the ‘Sands of Time’ sandpit excavation activity. This time, the team were joined by Senior Geomatics Officer, Chris Breeden, who came to show off his ‘machines that go bing’, otherwise known as a Bartington Grad601-2 dual fluxgate gradiometer and a CAT scanner. Chris was on hand to explain to the visitors to the Wessex Archaeology stall how gradiometers are used to undertake surveys to identify the presence of possible archaeological remains below the ground and demonstrate the use of CAT scanners to detect buried cables.