Complex sentence: The Henley Festival of Music and the Arts is held each July in England on the Berkshire bank of the River Thames, at the same spot and using adapted facilities from the Henley Royal Regatta, which is held the week before.
Split into simpler sentences: The Henley Festival of Music and the Arts is held each July in England on the Berkshire bankside of the River Thames. At the same spot and using adapted facilities from the Henley Royal Regatta, which is held the week before.