Campaigning Labour MP Ann Cryer has announced she would step down from parliament at the next general election.
She was elected MP for Keighley in 1997 and has campaigned on issues including forced marriage, domestic violence and improving the human rights of women
She also opposed military intervention in Iraq.
She told Labour Party members of her intention at a meeting in her constituency
The 68-year-old said: "For many reasons, mainly concerning my age, health and decreasing energy levels, I have taken the decision to stand down as MP for Keighley at the next general election.
"My campaigns on behalf of some of our most vulnerable people are coming to fruition, the Forced Marriage (Civil Protection) Act comes into effect in September
"This Act, along with new immigration rules I have been calling for, will help many young women and to a lesser extent men to have a greater say in the conduct of their own lives.
"I would like to thank the people of my constituency, who it has been an absolute privilege to represent for the last 11 years in Parliament.
"Of course none of us are aware of when the next election will be called, but my work and that of my office will continue on behalf of constituents until then.
"I will also be doing all I can to help promote whoever is selected as Labour's Parliamentary Candidate for the next election, illustrating the difference Labour has made for the people"
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