Walgreens Boots Alliance has decided not to sell its huge United Kingdom Boots business, after months of floating the idea. Deerfield, Illinois-based Walgreens began reviewing whether to sell Boots in January, but recently decided not to sell Boots or its No7 Beauty Company business, noting in a news release that “since launching the process, the global financial markets have suffered unexpected and dramatic change.” There are more than 2,200 Boots stores. “As a result of market instability severely impacting financing availability, no third party has been able to make an offer that adequately…