Complex sentence: In Somerset, 500 holiday cottages were serverly damaged while a U.S. oil drilling platform, under tow in the North Sea broke loose during the storm was nearly ran aground at Peterhead.
Split into simpler sentences: In Somerset, 500 holiday cottages were serverly damaged. A U.S. oil drilling platform, under tow in the North Sea, broke loose during the storm and nearly ran aground at Peterhead.