Being able to turn on your tap and have it run red with wine sounds like one of the more madcap ideas devised by Marie-Antoinette during an uneventful afternoon at Versailles,

but the concept has become a reality in London and the trend is fast gathering pace.

As with many innovations in the wine world, the concept originated in the US and has taken an embarrassingly long time to trickle across the pond. Restaurants in key US cities like New York, LA, San Francisco and Atlanta have been selling wine from kegs since 2011 and the number of on-trade venues selling wine on tap in America mushroomed by 68% last year.