Last week, having spent 2 days searching hardware stores & plumbers merchants across East London for a few inches of 19 mm hose, I threw out an appeal on Facebook. The next day I met today's guest and now I have a working shower pump again. David has worked with boats for a long while , is an active boater himself and his house backs onto the Hertford Union Cut. We talk about the changing nature of boating in London, new boating technicians, new boating technology and loads more.