Complex sentence: Rees-Mogg is the son of the late William Rees-Mogg, a former editor of "The Times" and life peer which entitles him to be addressed as The Honourable.
Split into simpler sentences: Rees-Mogg is the son of the late William Rees-Mogg, a former editor of "The Times" and life peer. This entitles him to be addressed as The Honourable.