The tourer I bought in November last year had the same sort of advisory, not in my ownership I add.
Nearside Rear Brake pad(s) wearing thin (3.5.1g)
Rear brake disc worn, pitted or scored, but not seriously weakened (3.5.1i)
They were one of the first items I dealt with after purchasing.
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I also did the front even though the one on looked to be good, I cant help it I like to start afresh
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I don't like advisories, to me it is a fault full stop.