Overview: Mel Giedroyc welcomes the three finalists back to the workshop nestled in ancient woodland on Wales' Glanusk Estate to make their biggest build yet - towering garden buildings. With just two days to build huge creations that would take professionals weeks to make, the woodworkers must give this final build everything they've got. Only one competitor can win, and it's up to judges Alex de Rijke and Helen Welch to decide who is Britain's best woodworker.