Complex sentence: The force polices the Avonmouth and Royal Edward Docks, situated in Bristol, and the Royal Portbury Dock, situated in the district of North Somerset.Under a memorandum of understanding serious crime will be handled by the local Home Office police force, Avon and Somerset Constabulary.
Split into simpler sentences: The force polices the Avonmouth and Royal Edward Docks, situated in Bristol, and the Royal Portbury Dock, situated in the district of North Somerset. Any serious incidents or major crime becomes the responsibility of the local Home Office police force, Avon and Somerset Constabulary.