If you look at the "Our Rabbis" page on the website of the United Kingdom's United Synagogue, you'll find people with the personal titles "Rabbi" or "Reverend," and with the organizational roles "Rabbi" or "Minister." (I'm leaving out Dayanim on the London Beth Din.)
What are the differences between a rabbi and a reverend, and what are the differences between a congregation's Rabbi and its Minister? Am I dividing these concepts up correctly?