Walgreens Boots Alliance, Inc. (NasdaqGS:WBA) is reaching out to potential buyers of the £7 billion ($8.8 billion) Boots drugstore chain in the UK, according to people familiar with the matter. The Deerfield, Illinois-based company is working with advisers to hold early-stage discussions with would-be bidders, said the people, who asked not to be identified because the matter is confidential. No formal sale process has begun, they said.