Jason Arday’s resignation from the University of Cambridge on Wednesday marked a full stop of sorts, but not an end to the furore surrounding his promotion to a professorship at the age of 37. Academic colleagues have demanded, with justification, that an investigation into his appointment to the faculty of education in 2023, and the subsequent fallout, should include people from outside the university. Allegations of plagiarism and claims made by Mr Arday about his background, career and charity fundraising remain under scrutiny. The memoir for which he said he had received a huge advance, billed as a triumph over adversity including an early autism diagnosis, is scheduled to appear later this month. His publisher, Simon & Schuster, ought to pause while inquiries run their course.

But several things are already clear. By failing to do due diligence on Mr Arday before launching him, with fanfare, as Cambridge’s youngest-ever black professor, and through its........

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