Thanks,
Initially MO stated 'No notifications' but re-running LOOT then gave a few, and especially two for Step Conflict Resolution:
# step patch - conflict resolution.esp
- CRC: FA8D5706
- Load Order Index: 66
- Attributes: Active
- Current Bash Tags: NoMerge, Actors.AIPackages, C.RecordFlags, Graphics, Keywords, Names, NPC.AIPackageOverrides, ObjectBounds, Sound, Stats, Text
## Messages
- Error: This plugin requires \"RealisticWaterTwo \- Resources\.esm\" to be installed\, but it is missing\.
- Error: This plugin requires \"RealisticWaterTwo\.esp\" to be installed\, but it is missing\.
MO says that RealisticWaterTwo is installed and enabled. MO 'reinstall' didn't help - in the end I did MO 'remove' followed by 'install', which at least cleared the notification.
I'll work through the other notifications, removing and installing.