Just boosting a post by David Steers, a Non-Subscribing Presbyterian minister and the editor of two journals, Faith and Freedom and the Transactions of the Unitarian Historical Society. When he promotes two collections of papers on Unitarian theology, I listen; you may also download PDFs of them there.
The papers were presented at conferences in 2016 and 2017. Why the conferences? Answered in the introduction of the first volume by convener Jim Corrigall:
The idea for a Unitarian Theology Conference arose out of discussions among ministers-in-training and newer ministers, who were all concerned by the lack of serious theological discourse within our Unitarian and Free Christian denomination. It’s fair to say we felt frustration over the inability of our faith community to give a coherent answer to such basic questions as: who are we as a faith community? and: what is our purpose?
The papers may also be seen as videos at ukunitarian.tv.
I look forward to reading those, and wonder aloud why our larger denomination on this side of the Atlantic hasn't done something so useful.