Disco 1 Wheel bearings - grease when changing disc?

My Haynes manual doesn't mention inspecting bearings or adding more grease while the hub is off to change a disc. Should I:
a) just refit the hub on the basis that the bearings seemed fine before
b) stuff more grease in then refit
c) while its off remove/clean/inspect the bearings and repack with new grease
d) refer to a different manual!

While the hub is off I personally would check the bearings clean them and repack with new grease,
I used Castrol LM grease, it’s all straight forward except removing the front seal can be a bit difficult
But I was going to change them anyway,

You'll need new seals and don't just add grease. If you're going to regrease then clean all old grease, inspect then repack with new grease.