Kill the King! And Other Conspiracies

At least two plots were aimed at Henry VII and George III, four against Elizabeth I, and more than three against James I. Queen Victoria survived eight plots while the present Queen Elizabeth II has survived three. William II was accidentally (?) killed hunting while two Anglo-Saxon kings were also murdered - one of them while he was in the loo! Several of these stories such as the Gunpowder Plot are well-known, but how many people know about the Ridolphi or Babington plots? Would history have changed if Guy Fawkes had succeeded?