From Witney, Market Square (Corn Exchange) bus to Oxford, Osney Island (Opposite Bridge St), walk to Oxford, train to Paddington Underground Station, then Tube to Victoria Underground Station. 2 h 22 min £36. From Witney, Market Square (Corn Exchange) bus to Gloucester Green Bus Station then bus to Victoria, Buckingham Palace Road Bressenden Place. 2 h 31 min £17. From Witney drive to London Victoria Station. 1 h 19 min £13.