Launching the website ‘Stand Up Speak Up’, Cameron said it would provide an online platform for people to get involved in shaping the next Conservative manifesto and influence the Shadow Cabinet’s decisions with their views.

He said: “Politics is about giving a lead, and we have set out a clear direction for our country: more green, more local, more family-friendly - less arrogant about what politicians can do on their own, and more optimistic about what we can achieve if we all work together. That's why it matters so much to me that we ask for your views in helping to shape our election manifesto.”

However, he stressed that not all recommendations would automatically become Conservative Policy and none will be adopted before they have been properly costed. He said:  “There will be some proposals we do not agree with. In some areas, hard choices will have to be made between competing priorities. And of course, we will only commit to policies that Britain can afford. No policies will be adopted until they have been properly costed by the Shadow Chancellor, George Osborne, and his Treasury team.”

He added: “…I want us to apply the same Conservative principles to the business of making policy. I want us to end the age of top-down, 'we know best' politics. Politics should be bottom-up and open - driven by the passions and priorities of the public.

For more information visit the Stand Up Speak Up website.