Our host visits the Tower of London and meets a Beefeater and one of the famous ravens. At the flat, site supervisor, Finn Hurley, updates us on framing and roofing progress. We then visit master thatcher Christopher White and get a lesson in this ancient roofing art. Our master carpenter visits a woodworking shop where the Volgers' new stairs will be made. Back at the flat, David Booth arrives with news that the local planning authority has said work must stop on the mansard extension so that they can review the proposed plan. A planning consultant adds his comments, and the homeowners are given the news.