Good, in principle. But also in principle, they shouldn't be telling you without getting into an affirmative-ongoing-consent three-way with the buyer.
You could, and you're right to ask the question and be ready to adduce some form of defence.
In practice, if it's moving inside the UK, it's vanishingly unlikely that it'll ever be an issue.
I'd be more concerned about the courier losing, stealing, breaking, or crushing it without compensation rather than legal consequences.