The End of Buy One, Get One Free in the U.K.?

The British government is considering legislation to outlaw BOGO promotions on the grounds of eliminating food waste. While the goal is good, how does a BOGO differ from offering better prices for larger packages (e.g., the quart bottle for $1.00, the half-gallon for $1.50) in terms of encouraging larger purchases? By the way, is it BOGO or BOGOF? I’ve always used BOGO, but I’m seeing a lot of BOGOF lately.