Complex sentence: In 1966, the salvage diver Keith Jessop and others removed some more of the wreck, without the permission of the owner of the wreck's salvage rights; they paid £400 in compensation to the owner, but were still prosecuted and fined £50.
Split into simpler sentences: In 1966, the salvage diver Keith Jessop and others removed some more of the wreck. However, they did so without the permission of the individual who owned the wreck's salvage rights; they paid £400 in compensation to the owner, but were still prosecuted and fined £50.