Conservative MP Crispin Blunt has declared he will step down at the next general election.
The erstwhile justice minister made the declaration in an affirmation broadcast on his website celebtating 25 years in Parliament.
"This statement is not the place for the tale of the ensuing 25 years," he said.
"But its purpose is to use this 25th anniversary to make public, what those closest to me have known privately for some time, that after seven increasingly tumultuous parliaments, this will be my last."
The MP for Reigate depleted 11 years in the armed military forces before his election in 1997.
He is also the uncle of performer Emily Blunt.
Past month, Mr Blunt atoned for "significant upset and concern" brought about by his safeguard of fellow MP Imran Ahmad Khan following his belief for sexually violating a teenage boy in 2008.
Mr Blunt had call out the decision given by the jury at the end of a trial a "dreadful miscarriage of justice" in an affirmation on his website.
But he has erased the message after Conservative Party officials said it was "wholly unacceptable"
In a declaration, Mr Blunt said he had determined to take back his affirmation and insisted "I do not condone any form of abuse and I strongly believe in the independence and integrity of the justice system".
Mr Blunt also offered his abnegate as chairman of an all-party parliamentary group (APPG) on LGBT matter in question following challenges from MPs about his remarks.
Mr Khan, who was cast out of the Conservative Party following the decision given by the jury at the end of trial, intends to apply against the belief.