Mohammad Sarwar is to stand down as the Labour MP for Glasgow Central at the next General Election.
Here is the full text of Mr Sarwar's retirement letter to members of the Labour Party.
Following the general election two years ago, I was delighted and proud to assume the chair of the Scottish Affairs Committee and felt that I was able to lead the committee well on significant issues affecting the people of Scotland with the support of my colleagues.
After discussions with my family and staff immediately after that election, I also decided that I would not be seeking re-election but had every intention of working hard in parliament and the constituency as MP for Glasgow Central until the next General Election.
As the Labour Party's affirmative nomination process is now beginning for sitting MPs across the city, it is the right time to inform you publicly of my decision.
I was first elected to parliament in 1997 for Glasgow Govan, re-elected in 2001 and after boundary changes elected to represent the new Glasgow Central seat in 2005.
I always put local needs first as a constituency MP and was delighted that my majority increased in each election with the hard work and commitment of local Labour Party members.
I am deeply honoured to have been an MP for our city over the past 10 years and will continue to work for all our communities in Glasgow Central until the next general election.
These years have been a demanding but wonderful experience during which I have faced many challenges on behalf of my constituents.
When I first entered parliament I could not have envisaged how diverse and varied it would be but I have enjoyed it, from launching the successful campaign to save Govan shipyard where I made wonderful friends to abseiling down the Finnieston crane for charity.
After three terms in the Commons, I feel that the time is right for me to move on to new challenges.
I hope to commit myself further to charitable interests in international development, continuing my work in promoting multi-culturalism and community relations across Glasgow and enjoying family life with my young grandchildren.
I have enjoyed unwavering support and loyalty from Labour Party members across the constituency.
I also hope to remain an active member, campaigning for the re-election of Gordon Brown as Prime Minister in the next election.
To show my appreciation I will be organising a 'thank you' party in the near future.