The first episode in the acting couple’s new series is titled London’s Lost Route to the Sea.
Timothy and Prunella – avid canal fans and narrowboat owners – go in search of the 19th century canal route, from Teddington, through Surrey and Sussex, all the way to Littlehampton.
They spent some time filming on the Loxwood section back in June, and we understand the programme features them travelling on the Trust’s trip boat Josias Jessop.
There is a section on the Wey & Arun restoration so far, including some archive photographs and interviews.
Great Canal Journeys, London's Lost Route to the Sea, is at 8pm on Channel 4 on Sunday, and there are four episodes in the new series.