There are many reasons that underpin the need for co-production, but the most fundamental one goes to the heart of this project. The reality is that despite the collective efforts of many equality advocates, we have not made sufficient progress in addressing mental or physical health inequality. Indeed, for many people from our diverse communities – including people from racialised communities, disabled people, people on low incomes, people from Irish Traveller communities, people in contact with the criminal justice system, and people who identify as LGBTQ+ (lesbian, gay, bisexual, trans queer1 and +, encompassing anyone who doesn’t feel include in the other categories) – we have seen inequality worsen, with more experiencing long-term and complex mental ill health than ever before.