LAST week’s small and perfectly formed mystery building was the pumping station at Greenberfield Locks on the Leeds and Liverpool Canal, on the outskirts of Barnoldswick.

Michael Townson, of Barnoldswick, tells us: “The station is used to control the flow of water from the reservoir at Winterburn.

“The reservoir was constructed for the sole purpose of keeping the canal at the correct level in the top pool of the canal between Barnoldswick and Barrowford. It is used in conjunction with the reservoirs at Foulridge and on white moor above Barnoldswick but the pump house only controls water from Winterburn. “

It was also correctly identified by Mark Newhouse, John Fletcher and Clifford Meehan.

Greenberfield Locks are the highest point on the Leeds and Liverpool Canal. The cafe at the locks, which has a substantial outside picnic area, is open again following the easing of coronavirus restrictions.

The Leeds and Liverpool Canal is 127 miles, is 200 years old and is the longest canal in Britain built as a single waterway.

Leaving Liverpool, it passes through East Lancashire and then crosses Pennine countryside and villages on the edge of the Yorkshire Dales before reaching Leeds.

It includes 91 locks on the main line and has several small branches, including in Skipton.

Following a major programme of resurfacing along stretches of the canal towpath, the already popular canal towpath has become even more popular with walkers and cyclists.

What about this week’s grand church. A little clue, the village where the church is situated was used as the location for a classic film. Suggestions by 8am on Monday to news@cravenherald.co.uk