SigmaRoc plc announced that it has appointed David McClelland to its Executive Committee as Managing Director for its third Platform, located in the west and south west of the UK (the Platform). Mr. McClelland was most recently a member of Tarmac's UK Executive Committee. As an Executive Committee member at SigmaRoc, Mr. McClelland will take responsibility for building the Group's third aggregates and quarrying focused Platform. The company announced acquisition of Foelfach Quarry. The first asset in the Platform that Mr. McClelland will oversee, will be the Foelfach Quarry located in Carmarthenshire, South Wales.