Complex sentence: The decision has been debated ever since but there is no evidence for allegations made later by exiles that there was panic in London on 6 December and most historians agree the Hanoverian regime would not have fallen even had the Jacobites reached London.
Split into simpler sentences: The decision has been debated ever since but there is no evidence for allegations made later by exiles that there was panic in London on 6 December. Most historians agree that the Hanoverian regime would not have fallen even had the Jacobites reached London.