...Things like a lampshade. Blinds. Pair of curtains. Outside furniture.
It's been over a decade and frankly they've disintegrated.
None of those things will have any residual value after a decade - and likely they were not new to begin with.
If your landlord actually bothers to raise a deposit dispute, just state the facts clearly and the adjudicator for the deposit protection scheme should find in your favour.
Your landlord can't simply withhold money from you. They have to go through dispute resolution process.
Do you know that your deposit is protected in a recognised scheme, and did your landlord provide you the Prescribed Information about the scheme? If not, then you will have a large claim against her.