If you can look past you're political leaning and bias, The Guardian is generally regarded as a reliable news source. Yes it is left leaning, but what is reported as 'news' in the paper is generally regarded to be factually accurate.
I despise the Daily Mail as much as the next sane human being but unless they've committed a crime then, no. Anyone with half a brain knows that the stuff written in the DM, S*n and Express is absolute nonsense and if you're stupid enough to buy it you deserve to be lied to.