In Fondue Pot, combine flour and mustard.
Set heat at SIMMER setting and gradually add half & half. Stir constantly until thickened.
Add shredded cheese, ¼ cup at a time, and stir until melted.
Add Worcestershire sauce and hot pepper sauce; stir. Heat 5 minutes to develop flavors. Keep setting at SIMMER.
For serving, spear Rye or French bread cubes with fondue forks or dip with crackers.