Fish Monger by Prunella Clough, Can$35,000 (£20,930) at Lunds.

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These paintings of men and women at work on production lines or on building sites are a distinct group that by the 1960s gradually disappeared as Clough’s canvases became more abstract.

This painting, Fish Monger, showing a worker packing fish (probably at the famous Billingsgate Market in the City of London) was executed in muted greys with the shock of bright orange - a colour scheme Clough said reflected the British climate.

The 18 x 11in oil on canvas came for sale at Lunds Auctions (20% buyer’s premium) in Victoria, Canada, on October 24 from a consignor whose family had owned it since 1953.

Estimated at Can$10,000-15,000, it hammered for Can$35,000 (£20,930).