Complex sentence: He is pursued across a fog-bound London by Inspector Hutton and his sergeant who are helped in their investigation by Peter Mandelson, Gordon Brown and Margaret Thatcher but Blair may be innocient of the crime he is accused of committing.
Split into simpler sentences: He is pursued across a fog-bound London by Inspector Hutton and his sergeant who are helped in their investigation by Peter Mandelson and Gordon Brown. But it gradually emerges that Blair may be innocient of the crime he is accused of committing.