(Corrects date of election in 1st paragraph)
LONDON, Nov 23 (Reuters) - Prime Minister Boris Johnson's lead over the opposition Labour Party has narrowed slightly ahead of Britain's Dec. 12 national election, an opinion poll by Deltapoll for the Mail on Sunday newspaper showed on Saturday.
Support for Johnson's Conservative Party stood at 43%, down two percentage points from last week, while Labour was unchanged at 30%. The pro-European Liberal Democrats rose five points to 16%, the poll showed. (Reporting by Andy Bruce; editing by Jonathan Oatis)