NewStatesman
The website of the New Statesman magazine has a pool of regular contributors, but unsolicited pitches will be read and writers paid if published. A fee should be negotiated before work is accepted and published.
Timely, well-written pieces bringing a new angle to current affairs and politics are wanted. Outline your pitch in the body of an email with a short paragraph saying what it is about, your expertise for writing it and if relevant, the names of any potential interviewees.