The Horizon institute is a multidisciplinary centre of excellence for Digital Economy (DE) research. The core mission of Horizon has been to balance the opportunities arising from the capture, analysis and use of personal data with an awareness and understanding of human and social values. The focus on personal data in a wide range of contexts has required the development of a broad set of multidisciplinary competencies allowing us to build links from foundational algorithms and system to issues of society and policy. We follow a user-centred approach, undertaking research in the wild based on principles of open innovation. Horizon now encompasses over 50 researchers, spanning Computing, Engineering, Law, Psychology, Social Sciences, Business and the Humanities. It has grown a diverse network of over 200 external partners who are involved in ongoing collaborative research and impact with Horizon, ranging from major international corporations to SMEs, from a wide variety of sectors, alongside government and civil society groups. We have also established a CDT in the third wave of funding that will eventually deliver 150 PhDs. Our critical mass of researchers, partners, students and funding has already led to over 800 peer-reviewed publications, composed of: 277 journal articles, 51 books and book chapters, and 424 conference papers, in a total of 15 different disciplines. Over the years Horizon's focus has evolved from an emphasis on the collection and understanding of personal data to consider the user-centred design and development of data-driven products. This proposal builds on our established interdisciplinary competencies to deliver research and impact to ensure that future data-driven products can be both co-created and trusted by consumers. Core to our current vision is the idea that future products will be hybrids of both the digital and the physical. Physical products are increasingly augmented with digital capabilities, from data footprints that capture their provenance to software that enables them to adapt their behaviour. Conversely, digital products are ultimately physically experienced by people in some real-world context and increasingly adapt to both. This real-world context is social; hence the data is social and often implicates groups, not just individuals. We foresee that this blending of physical and digital will drive the merging of traditional goods, services and experiences into new forms of product. We also foresee that - just as today's social media services are co-created by consumers who provide content and data - so will be these new data-driven products. At the same time, we are also witnessing a crisis of trust concerning the commercial use of personal data that threatens to undermine this vision of data-driven products. Hence, it is vitally important to build trust with consumers and operate within an increasingly complex regulatory environment from the earliest stages of innovating future products. Our user-centred approach involves external partners and the public in "research-in-the-wild", grounding our fundamental research in real world challenges. Our delivery programme combines a bottom-up approach in which researchers are given the opportunity (and provided with the skills) to follow new impact opportunities in collaboration with partners as they arise (our Agile programme), with a top-down approach that strategically coordinates how these activities are targeted at wider communities (our Campaigns programme, with successive focus on Consumables, Co-production and Welfare), and reflective processes that allow us to draw out broader conclusions for the widest possible impact (our Cross-Cutting programme). Throughout we aim to continue to develop the capacity in our researchers, the wider DE research community and more broadly within society, to engage in responsible innovation using personal data within the Digital Economy.

We will work with young people to use digital technology to transform adolescent mental health and provide a safe, and supportive, digital environment to tackle the unmet need arising from mental health disorders in those aged 10-24 years old. We are facing a youth mental health crisis; in the UK, one in eight young people have a mental health disorder, and one in four young women aged 17-19 have significant depression or anxiety with half of those having self-harmed; non-suicidal self-harm has nearly tripled over the past 10 years, while suicide rates per 100,000 adolescents have almost doubled. However, less than a third of all young people with mental health disorders receive any treatment. Many mental health and wellbeing apps exist, but most have no evidence base and some could even be harmful. Meanwhile, few research-based digital interventions have been shown to have impact in the real world. The youth mental health crisis has coincided with huge changes in society with creation of the 'digital environment' where being online and using social media has become central to young people's lives. While social media can be a helpful place for accessing information, exchanging views and receiving support, it has also been linked with depression, suicide and self-harm. Yet not all young people are at risk of mental health problems with social media we don't yet understand why some young people are more vulnerable than others. The COVID-19 crisis has been associated with increased mental health problems and greater online activity in young people. While their need to access trusted support online is greater than ever, social media platforms are not designed to meet mental health needs of young people. Aims & objectives. We will work with young people in our Young Person Advisory Group to: 1. increase understanding of the relationship between digital risk, resilience and adolescent mental health. 2. develop and evaluate preventative and personalised digital interventions. We aim to: - identify risk and resilience factors related to troublesome online experiences and activities, to prevent or reduce the emergence of depression, anxiety, and self-harm in young people. - understand how individual differences affect digital engagement (e.g. with social media and games) and adolescent brain and psychosocial development. - build, adapt and pilot new a generation of personalised and adaptive digital interventions incorporating a mechanistic understanding of human support with a new digital platform for delivery and trials in adolescent mental health conditions. - develop and test a novel socially assistive robot to help regulate difficult emotions with a focus on adolescents who self-harm. - develop and test a new digital tool to help adolescents better manage impulsive and risky behaviour with a focus on reducing the risk of self-harm. Applications & benefits. This work will translate new knowledge into practical tools to support young people negotiate the digital world, develop resilience and protect their mental health. Our involvement of young people means that the outputs from the research will be suitable and meaningful. Young people will be actively involved shaping the research at all stages. Young people, their caregivers, teachers, clinicians and charities will benefit from a range of co-created apps and tools to manage youth mental health issues. Young people will benefit from research training offered as part of their involvement. Policy makers and academics will benefit from new understandings of risk and resilience in the digital world to support novel interventions and evidence-based policy. Our work will establish a new, ethical and responsible way of designing digital platforms and tools that supports young people's mental health. Our Mental Health & Digital Technology Policy Liaison Group and Partners Board will translate our research into a step-change in mental health outcomes.