The Unitarian Christian Association is an affiliated society of the General Assembly of Unitarian and Free Christian Churches, a.k.a. the British Unitarians. I've wanted to join for some time; I like their publications -- I almost wrote publicans -- and tone. But without access to a pounds sterling account, it has been impractical to try. (Might cost more to send the money than the Â£20 dues.)
But now they have a PayPal account. And so I've signed up. Since I have a PayPal account it took only a couple of minutes.