Complex sentence: The handle of the Queen's Baton is made of Elm wood from the Isle of Cumbrae in Scotland which was felled by local man David Stevenson in the garrison grounds and is crafted using an old boat building technique called bird mouthing.
Split into simpler sentences: The handle of the Queen's Baton is made of Elm wood which came from the Isle of Cumbrae in Scotland. It was felled by local man David Stevenson in the grounds of the garrison and is crafted using an old boat building technique called bird mouthing.