Just finished reading this book.
When N.T. Wright calls Thomas' work "theologically explosive", that is an understatement. If, as I believe, the New Perspective guys are right, and if it's the case that these earliest of Christian sources reveal a view of the "works of the Law" that is consistent with the NP, then stick a fork in the Protestant Reformation, English and Continental, it's done. That means, inter alia, that the Articles and Homilies are indeed nothing more than "historical documents" that should not enjoy confessional status, and are therefore not binding on Anglicans, as the Protestant soteriology reflected there, in the final analysis, finds neither apostolic nor patristic warrant.
Note especially the highlighted comment from the conclusions section: