Ten years ago, recently graduated and unemployed, I sent my CV to a raft of radio producers. Just one replied. ‘Dear Oliver,’ wrote Marilyn Imrie, in an email with the subject line ‘YOU’: ‘How nice to hear from you and about you.’ Her generosity and enthusiasm were writ large in those three capitals, which headed a letter that came festooned with advice, offers of work experience and an anecdote about her adaptation of Samuel Richardson’s Clarissa.