On June 30 2010. But banks will still except after June. So your okay don't panic
What Date Will The Old Twenty Pound Note Go Out Of Circulation?
30th of june
30th June 2010. However, banks and other financial institutions will accept the old Elgar £20 notes as deposits for some months after this date.
30 june 2010
What date will the old Twenty pound note go out of circulation and up to what date can you change them at the banks?