Question: The Royal Bank of Scotland £20 note is a banknote of the pound sterling, the current cotton note, first issued in which year, bears an image of Lord Ilay, one of the founders of the bank, on the obverse and a vignette on the reverse of Brodick Castle, a castle situated outside the port of Brodick on the Isle of Arran, an island in the Firth of Clyde, Scotland?
Sentence (from "Brodick Castle"): It was previously a seat of the Dukes of Hamilton, but is now owned by the National Trust for Scotland.
Relevant evidence: No