Published:  12:37 AM, 29 September 2017

Air-raid shelter feeding London restaurants

Air-raid shelter feeding London restaurants Co-founder of the 'Growing Underground' project, Steven Dring inspects the crops at the urban farm project, 'Growing Underground', in Clapham, south London. -AFP

Under an anonymous back street in south London lies a vast underground air-raid shelter that has been turned into a pioneering urban farm supplying supermarkets and restaurants in the capital. The World War II shelter in Clapham, which could protect up to 8,000 people from Nazi German bombs, consists of two large tunnels that were intended to one day become an extension of the London Underground.

That never happened and the shelter lay abandoned for 70 years until two entrepreneurs, Steven Dring and Richard Ballard, decided to grow broccoli, coriander, fennel and a host of other vegetables as so-called micro leaves, also known as micro herbs, grown from seedlings but harvested early when the first leaves form. "We need to create these new fertile spaces" to meet increased demand from a growing global population, Dring told AFP on a visit to the "Growing Underground" site -- some 33 metres (108 feet) below the road.

Staff wear protective clothing and there is a strong smell of vegetables and humidity in the shelter. The vegetables are grown with hydroponics, using nutrient solutions in a water solvent instead of soil. The technique can also be used to grow a wide range of produce including tomatoes and baby peppers, Dring said. The only other ingredient required is light.

The tunnels have no natural light and are illuminated with pink LEDs, giving them a futuristic look. The intensity of the light changes to imitate daylight, but with one major difference -- the lights are dimmed during theday and shine brightest at night, as electricity is cheapest then. "We predominantly grow micro herbs, which are standard herbs, from different seeds. "But what we do is we grow them to a very small stage, before the first true leaves start to come out," Dring said. The micro herb broccoli takes between three and five days to grow before being packaged up in the shelter and sent off.

Fans enthuse about the intensity of the flavors of the produce. Customers include Marks and Spencer which offers the produce in some of its supermarkets, several stalls at London's Borough Market and many restaurants -- helped by the patronage of celebrity chef Michel Roux Jr. of Le Gavroche. Dring and Ballard latched onto the concept of vertical farming -- producing food in vertically stacked layers -- which was developed by US biologist Dickson Despommier in his 2010 book "The Vertical Farm: Feeding the World in the 21st Century".

The operation takes up some 200 metres (656 feet) of the 1,000 metres available in the air-raid shelter tunnel, half for growing while the other half is used for packaging. Their request to use the air-raid shelter in Clapham was eagerly taken up by the owners of the space, London's public transport company.

-AFP, London

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