Conservative MP Tim Yeo has suggested that his support for gay marriage, climate change work and pro-European stance may have affected the decision not to readopt him as the South Suffolk candidate for the next election.
Mr Yeo lost out in a secret ballot of more than 600 members of the constituency party despite receiving backing from David Cameron.
It has been a privilege to serve as MP for South Suffolk since 1983. I will continue to work for all my constituents until the General Election next year.
I am immensely grateful to all those Conservative Party members who voted for me to continue as their MP. I now ask them all to campaign for my successor with the same loyalty and dedication they have shown to me.
I will give my full and unqualified support to whoever is chosen as the candidate here in South Suffolk. I wish him or her every success.