Stonehenge Inner Circle and Windsor Castle tour from London

Hey all, Last minute excursion planning here. We are going to be in London in October for a limited few days after Paris. Arrive afternoon on a Saturday and flight back to states Wednesday afternoon. Windsor castle is closed on Tues/Wednesdays in October and Sundays you can't see inside St.George's chapel. I'm needing recommendations for tours that include inner circle Stonehenge and Windsor castle on a monday if you have any.