They are part of the #Freethefeed from Elvie, a techonology company that specilaises in products for women.
Stand up to Facebook Medical Artist Campaign
PHOTOS: Giant Inflatable Boobs Appear Across London on Mother's Day
Mother London & Elvie: Giant boobs appear in London on Mother's Day – The Stable
Video: Giant inflatable boobs appear all over London to support breastfeeding in public – The Irish News
Parenting – Latest news, opinions and stories about parenthood - page 100
Dozens of medical tattooists dress as giant inflatable BREASTS outside Facebook HQ
Cleavage (breasts) - Wikipedia
Giant Inflatable Boob On London Rooftop To Promote Breastfeeding! - Mumslounge
WORK: Mother's giant boob sculpture promotes freedom to breastfeed