The beer, which has just been launched in draught, will be bottled for the off-trade although listings have not yet been confirmed.
Director Peter Haydon said: “The popular conception is that stout is an Irish drink whereas stout is based on porter, so it is a London drink.”
Haydon said the descriptions "double" or "single" were an old brewing convention indicating strength. "We have made it single, which is 4.5 per cent abv," he added.
London stouts are sweeter and less astringent than Irish stouts with a “softness and inherent malt sweetness”, said Meantime in a statement.
Meantime has also given Suffolk brewer Adnams exclusive distribution and sales rights for its draught beers throughout the UK plus sales rights to all packaged beers.
Founder Alastair Hook said: “Adnams and Meantime share a similar philosophy and passion which we strive to express to our customers, who understand and identify with the special nature of our beers.”
Meantime will move to a new plant in East Greenwich in 2010 when its current 10-year lease runs out. “Building works should start in the middle of next year. Our current production is 15,000 hectolitres (hl) and the new brewery will have the potential to go to 50,000 hl,” Hook said.
The brewer supplies Sainsbury’s with its Taste the Difference beer range and also sells its branded beer in Waitrose stores within the M25, as well as selected independent shops.