LONDON (Reuters) - Britain's old-style £20 bank notes featuring composer Edward Elgar will cease to be legal tender on June 30, the Bank of England said yesterday.

Since 2007, £20 bank notes depicting economist Adam Smith have gradually replaced the old ones, which were first issued in 1999. But 10 percent of £20 bank notes — worth £3 billion ($4.55 billion) — still show the early 20th century composer's portrait.

Retailers will no longer routinely accept old-style £20 notes after June 30, though the Bank of England will exchange them indefinitely and commercial banks and building societies will continue to accept them from customers for several months.

The Bank of England periodically changes the design of bank notes in circulation, largely to improve security features.

For more details on the change, see: http://www.bankofengland.co.uk/banknotes/twentyv/index.htm