Qld MP admonished for contempt

A Queensland politician who disclosed secret information and then misled parliament about it has become the first MP to receive a public rebuke in 17 years.

Warrego MP Ann Leahy has admitted in parliament she was wrong in the way she went about exposing one of several bungles by former Police Minister Jo-Ann Miller that eventually led to her cabinet resignation.

Ms Miller later told parliament she had made a police complaint about Ms Leahy breaking the law by giving misleading evidence to a parliamentary committee and breaching secrecy provisions.

On Thursday, Ms Leahy - who could face criminal charges over the saga - delivered a sincere apology to the House before she was admonished by Speaker Peter Wellington.

"Your behaviour has been inappropriate and must change if you are to regain the respect of your peers," Mr Wellington told the Liberal National Party MP.

The last time an MP was admonished by the Speaker in parliament was in 1999.