Sophie Devonshire, Chief Executive of The Marketing Society, joins the IPA New Business Diaries podcast to talk to BBH London's Ellie Olliff about what clients really want from their agencies and how purpose and culture can make the difference between a transactional relationship and a true partnership.

The Effectiveness Files: Depop

The IPA is the professional body for advertising, media and marketing communications agencies in the UK. We represent over 300 agencies, which are responsible for 85% of UK advertising and communication spend.&nbsp;Our shows, AdTalk with Paul Bainsfair, The Effectiveness Files with Laurence Green, Making Sense, New Business Diaries, and IPA On... Talent Matters break down the big issues facing the advertising and communications business.