A property developer has created London’s biggest cash cow by building this £25 million mansion on the site of an old milking parlour. See SWNS story SWMILK; The stunning 8,139 sq/ft home on Farm Street in Mayfair boasts five bedrooms, an indoor swimming pool, gym, lift and media room. But 150 years ago, the location wasn’t one of opulence and grandeur – but of agriculture as one of central London’s milking parlours. Cows would have been brought to Farm Street from grazing areas which included Peckham, Holland Park and Hampstead Heath. They were then sold to local butchers.