The call is open to applicants who have completed their PhD at a research organisation that is part of an ESRC Doctoral Training Partnership (DTP) and who are within 12 months of passing their viva voce. At the submission deadline, the applicant must either have been awarded a PhD or have submitted their thesis and passed their viva voce with minor corrections, with the expectation that the PhD will be awarded by the fellowship start date.
See the ESRC website for further details.