Together we face two big challenges. We need to renew both our ideas and our organisation. And they depend on each other: organisation without ideas is sterile, ideas without organisation is futile.

Regaining people's trust starts with renewing our party. I want an open, plural and outward facing politics. I want a living breathing movement; a place where people come together to achieve change. We need to learn from the best traditions of trade unions and community organising so that even though we are out of office, we are not out of power.

I will match these words with action. I am already using my campaign to train 1000 future leaders in the values and practices of community organising, returning our party to its roots. As Leader, I would strengthen party democracy through an elected chair and defend our trade union link against any Tory attack. I want to double the number of party members by the next election and I will raise money for a Leadership Academy to support and train candidates from under-represented groups.

Our movement will be powered by our ideas. In Government we were at our best when we won the arguments and shifted the centre ground to the left. The task before us remains the same: to apply our values to future challenges, not past debates. And we should be in doubt Labour is the only force in British politics able to do this.

On the economy, Labour is at its best when it is a radical reformer of the market as well as the state. So I want a cap on the cost credit to end the exploitation that poor families face; I want to look at a British Investment Bank to promote growth in all our regions; I want to extend the future jobs fund for all people at risk of long-term unemployment. Above all we need to shape a new political economy for jobs, growth and wealth creation brings together the role of government taxation, regulation and procurement to support a thriving private sector.

On pay inequality, Compass members were right to call for a high pay commission to look at the drivers and impacts of spiraling pay at the top. We were too hesitant to look at this in Government. I will also campaign for a living wage in the public sector so a decent day's work gets a decent days pay.

On sustainability, we now have the legislation in place, which I began as Environment minister, but we need to turn laws into real change. That means greater electrification of our transport infrastructure, more retrofitting paid for by reductions in energy bills and renewables taking a greater share in our energy mix.

On political reform, we need to drag our constitution into 21st century not just with changes to the electoral system but with an overhaul of our centralised political culture. That means real power for local government and local people. It means being comfortable with dialogue and debate at all levels.

All this is important, but can't be achieved unless Labour regains the trust and support of the British people. We have a responsibility to win back power so we can begin again the work of building a more free, equal and democratic society.

Rt Hon David Miliband MP