Mystery photo challenge

Hint: This publicity shot from the 1962 film ‘The Young Ones’, starring Cliff Richard, was filmed in 1961 on a reservoir that was built for which canal?  Bonus points if you know the name of the reservoir and why this part of the film was filmed here.

Answer: The canal is the Grand Junction Canal, now part of the Grand Union Canal.  The reservoir is now known as Ruislip Lido, but no longer supplies water to the canal.  The reservoir was completed in 1811, and the long feeder channel in 1816 entering the canal at Hayes Bridge, Hayes.  The 8-mile length of the feeder was its downfall and it ceased being used in 1851.  Eventually the reservoir was sold to the local authority and the feeder stream abandoned, much of it now disappeared under housing and another chunk recently obliterated by HS2 without ceremony.  Read more about the feeder stream here.  The reservoir is now owned and operated by Hillingdon Council.  The site was popular with film studios of north and west London because of its close proximity, which saved on costs, including for the film ‘The Young Ones’, which was mostly filmed at Elstree studios.

Correctly guessed by: Malcolm Bridge, Ivan Cane, Geoffrey Castro, Alan Dodds, George Eycott, John Hawkins, Martin Hunt and Cyril Wood

Hint: This photo, taken in 1975, shows the north end of a tunnel no longer in use for navigation, at the heart of the Midlands canal network.  Can you identify the tunnel?

Answer: The photo shows the northern entrance to the original ‘Brindley’ Harecastle Tunnel (opened 1777).  Although often thought of as a single tunnel, there are two separate parallel canal tunnels.  The original tunnel had a network of smaller canals that lead to mines at Goldenhill, in which James Brindley, who designed the tunnel, had a share.  Operation of the canal access to the mines ceased in 1820, when it became unsafe.  The original tunnel was 2,630 metres long, had no towpath, and a low ceiling.  It’s limitations became obvious soon after opening, as it became a bottleneck on the otherwise successful Trent & Mersey Canal.  In the 1820s, Thomas Telford was commissioned to build a new tunnel of slightly greater dimensions, which opened in 1827, complete with towpath.  This is the tunnel in use today, although the towpath was taken out in the 1970s, having been disused for many years owing to collapse.  The original Brindley tunnel remained in use until the late 19th century, and has not been inspected throughout since the 1960s; it is now fenced off (since the photo was taken) to prevent access.  Thanks to John Fletcher for the photo.

Correctly guessed by: Mary Bithell, Jerry Bolter, Ivan Cane, Tony Clayton, Ian Cleathero, Chris Davey, Rodney Hardwick, Andy Lintern, Kenneth Nelson, Gwenyth Salt, Dave Turner, Cyril Wood and Jack Wootton.