London, Apr 11 : A senior aide of British Prime Minister Gordon Brown has been forced to apologize for sending inappropriate juvenile emails from a Number 10 account.

The private missives, written by special adviser Damian McBride, are said to feature ideas for potential smear stories about senior Conservatives.

They were apparently sent to Derek Draper, who runs a Labour-supporting political blog, the Daily Express reported.

They have now come into the possession of Paul Staines, however, whose `Guido Fawkes' blog is hostile towards the Government and the Labour Party in general.

"Neither the Prime Minister nor anybody else in Downing Street, except the author, knew anything about any of these private emails. The author of these emails has apologised for their juvenile and inappropriate nature and for the embarrassment caused. All staff will be reminded of the appropriate use of Number 10 resources," Brown's spokesman said.

McBride has been in charge of strategic planning at Downing Street since last October, when he was moved from his position as Brown's political spokesman.

His emails have apparently been touted around newspapers, although none have yet published them.

According to the Daily Telegraph, the emails feature unfounded claims about Tory leader David Cameron and shadow chancellor George Osborne. (ANI)