Introduction More people are surviving major trauma, often with life changing injuries. Alongside physical injury, many survivors of major trauma experience psychological and psychosocial impacts. Presently, there is little guidance at the UK national level for psychological and psychosocial aspects of major trauma care. Set in the context of the regional model of major trauma care implemented in the UK in 2012, the purpose of this review was to identify and bring together primary research about psychological and psychosocial aspects of major trauma care in the UK to produce an overview of the field to date, identify knowledge gaps and set research priorities. Methods A scoping review was undertaken. Seven electronic databases (MEDLINE, Cochrane Library, CINAHL, Embase, PsycINFO, SocINDEX with Full Text and PROSPERO) were searched alongside a targeted grey literature search. Data from included studies were extracted using a predefined extraction form and underwent bibliometric analysis. Included studies were then grouped by type of research, summarised, and synthesised to produce a descriptive summary and overview of the field. Results The searches identified 5,975 articles. Following screening, 43 primary research studies were included in the scoping review. The scoping review, along with previous research, illustrates that psychological and psychosocial impacts are to be expected following major trauma. However, it also found that these aspects of care are commonly underserved and that there are inherent inequities across major trauma care pathways in the UK. Conclusion Though the scoping review identified a growing body of research investigating psychological and psychosocial aspects of major trauma care pathways in the UK, significant gaps in the evidence base remain. Research is needed to establish clinically effective psychological and psychosocial assessment tools, corresponding interventions, and patient-centred outcome measures so that survivors of major trauma (and family members or carers) receive the most appropriate care and intervention.