How long does a LC20 offence stay on my drivers license?

I got the conviction on sept 2008.
Update: One more thing, I heard you have to pay the Dvla £ 20 to remove the offence from your licence once it expires, is this true?
Update 2: One more thing, I heard you have to pay the Dvla £ 20 to remove the offence from your licence once it expires, is this true?
2 answers 2