Complex sentence: In partnership with Bruce McWilliam he established his own law firm, Turnbull McWilliam during 1986 Turnbull defended Peter Wright, a former MI5 agent who authored the book "Spycatcher", and successfully blocked the British government's attempts to suppress the book's publication.
Split into simpler sentences: In partnership with Bruce McWilliam he established his own law firm, Turnbull McWilliam, in 1986. In that year Turnbull defended Peter Wright, a former MI5 agent who authored the book "Spycatcher", and successfully blocked the British government's attempts to suppress the book's publication.