The Financial Conduct Authority (www.practicallaw.com/A36105)'s (FCA) list of securities that have been admitted to listing. The FCA must maintain the Official List in accordance with Part 6 of the Financial Services and Markets Act 2000 (www.practicallaw.com/A36104).
For further information, see Practice note, Which market? (www.practicallaw.com/6-107-3993).