Thanks Milan, You are correct - exclusively locking the LV allows it to be pvmove'd.
I can't quite remember the steps I took but in case the following benefits someone else, it was something along the lines of:
# lvchange -aey <lv> # pvmove -n <lv> <pv> # lvchange -aen <lv> -- Russell Howe rh...@bmtmarinerisk.com -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org