Shenley Road tank was a fire prevention feature of Boreham Wood.
This brick structure was a bunded tank. It was full of water for the fire brigade to use should there be a fire at the nearby studios.
Local children would catch sticklebacks there.
Licence: Creative Commons Attribution-ShareAlike Licence

The rectangular structure in the foreground was a water tank. This aerial view looks along the line of Elstree Way in the 1950s. It also shows the large white bulk of the Studio Cinema.
Elstree and Borehamwood Museum
68 Shenley Road 68 Shenley Road was a shop on the corner of Furzehill Road - now disappeared. ABPC Elstree Studios British National Pictures Ltd purchased 50 acres of land on the south side of Shenley Road and began construction of two large film stages in 1925. The first film produced there was Madame Pompadour in 1927. Bullbaiters Farm Bullbaiters Farm near Boreham Wood was originally called Bullbeggar's Farm - Bullbeggar meaning 'hobgoblin' or 'scarecrow'. Neptune House Neptune House, built as part of the ATV studios, is now part of the BBC studios. Ark Avenue, WD6 Ark Avenue has been built on the former Holmshill School site.
Borehamwood is a town of approximately 30 000 residents in southern Hertfordshire, just outside London, and part of the London commuter belt.Borehamwood, more commonly called Boreham Wood before the LCC estate was built, is part of the borough of Hertsmere. The town is often associated with the nearby village Elstree (being part of the ancient parish of Elstree), the two still share a local council, now called the Elstree and Borehamwood Town Council.
The A1 passes just to the east of the town, and the M25 passes about two miles north of it.
Since the 1920s, the town has been the location of several film studios. The former British National Studios on
Clarendon Road are now the BBC’s Elstree Television Studios. One of BBC’s popular soaps, EastEnders, is produced at the BBC studios, as well as popular medical drama Holby City. ’Who Wants to Be a Millionaire?’, ’Big Brother’ and major feature films are filmed at the Elstree Studios in
Shenley Road.