ET 01: Have expanded the trench to the bottom edge of the terrace, so that now one of the long edges is 13m and the other is 14.5m. The width remains 3m although neither of the edges is 3m long. .
At the moment, defining the unit and removing topsoil. Because there is no baulk between the old part and the extension, locus numbers will be sequential, topsoil is locus 7.