Agreed - apparently Bath were one of 3-4 clubs looking for locks, but not finding any.
I'd guess that SA is the usual lock-shop, and their all champing at the bit to knock the Lions about. May be some room for signings post-tour.
If not, then Richards is ready to step up, Williams is... okay at lock, and Bayliss and Ellis can do a job in an emergency, so we've got cover.
The whole thing just looks unbalanced towards the back 5 though - I expected Roko and Atkins to be gone; but I guess everyone just signed 2-year deals last summer, so only those who want to move, are moving.