Mine had extra months on it, but after the official withdrawal from the EU, these didn't count any more. My ten years had expired, so I had to renew now, rather than in the early spring next year.
I filled out a form online, took a really crappy photo with my phone, and posted back my old passport (that went from France to England by way of Germany!).
Waited a while, then got a message to say my application had been approved, it turned up in the mailbox a few days later.
A pretty painless trouble-free experience.

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