In just over a week's time, I shall reach the tenth anniversary of my
 election to Parliament in the Brent East by-election. I took some time 
off this summer and found myself reflecting a great deal on the last ten
 years.
It has been an enormous privilege to serve as an MP in Brent. Indeed,
 for me personally, so much of the last decade has been both rich and 
surprising. I am not sure that I would ever have expected to be elected 
so young, and I certainly never expected that I would have had the 
opportunity to serve in Government.
The greatest privilege of my work both as a constituency MP and as a 
Minister has been the gift of being able to share in the private joys 
and struggles of so many people's lives - many different from one 
another and very different from my own. I shall always be inspired by 
the profound courage and dignity I have witnessed in people I have 
worked with, often in the face of the most extraordinary difficulties.
Of all my parliamentary work, the campaign I remain most proud of is 
the campaign to get my constituent released from Guantanamo Bay. I shall
 always count the moment my constituent walked back in through his own 
front door and picked up his five year-old daughter for the first time 
in her life as one of the most precious of my life.
In Government, the moment I count as my proudest is the one where I 
listened to Nick Clegg announce our intention to end the routine 
detention of children in the immigration system - something I worked 
hard to deliver, in what, at times, felt an almost insurmountable battle
 with the Home Office. I feel humbled too to have been able to play my 
part in delivering the pupil premium to schools and to extend free early
 education to two year olds, and perhaps the work dearest to my heart, 
that of reforming the system of support for children with special 
educational needs.
There have been so many rewards to this work -- too many to list 
here. But having taken the summer to reflect on the future, I feel now 
that at the General Election, the right time will be right for me to 
step aside. I wanted to explain why I have decided not to seek 
re-election in 2015.
I first joined the party almost exactly twenty years ago, during 
fresher's week at university. It was then -- and still is now - 
absolutely inconceivable that I could ever join any other political 
party. As with most party members, there have always been a few issues 
where I have disagreed with party policy. But over the last three years,
 what has been difficult is that policy has moved in some of the issues 
that ground my own personal sense of political vocation - that of 
working with and serving the most vulnerable members of society. I have 
disagreed with both Government and official party lines on a whole range
 of 
welfare and 
immigration
 policies, and those differences have been getting larger rather than 
smaller. Disagreements with the party on other areas of policy I have 
always felt could be managed, but these things are just core to my own 
sense of calling to politics. I have tried hard to balance my own desire
 to truthfully fight for what I believe on these issues with the very 
real loyalty and friendship I feel to party colleagues, but that has 
created intense pressure, and at times left me very tired. I don't think
 it is sustainable for me personally to continue to try and do that in 
the long term.
I want to reassure people in Brent that I shall continue to work very
 hard to represent them over the next 18 months until the next General 
Election. My constituency office will remain open five days a week, just
 as it has always been. I shall be out campaigning for the local 
elections with my local LibDem team over the forthcoming months and will
 campaign to get my Liberal Democrat successor elected to Parliament in 
the General Election. In Parliament I shall continue with my work as 
Chair of the All Party Parliamentary Group on Refugees and will carry on
 making the case for a fair and humane immigration system as Parliament 
considers a new immigration bill in the coming months.
I hope that I have been able to support and represent the people of 
Brent well as their MP, but I feel rich beyond measure to have been able
 to do this work here. I shall always count myself indebted to those who
 gave me this opportunity to serve - to the thousands of constituents 
who voted for me and to the many Liberal Democrat supporters and members
 who campaigned and walked the streets for me over three elections. I 
hope that, over the last 10 years, I have at least gone some way in 
repaying the faith that so many have shown in me.
Sarah