The COVID-19 pandemic has been a devastating, mass bereavement event characterised by sudden unexpected deaths and high levels of disruption to end-of-life, grieving and coping processes, as well as social life more broadly. We analysed qualitative free-text data from two independent UK-wide online surveys to describe in depth the experiences of 881 people bereaved during the Covid-19 pandemic using. We analysed the data in two phases, conducting an inductive thematic analysis and then applying Stroebe and Schut Dual Process Model (DPM) (1999; 2010) as an analytic lens to further contextualise and interpret the data. The DPM identifies loss-oriented and restoration-oriented coping processes between which grieving people naturally oscillate. Loss-oriented coping involves coming to terms with the death and lost relationship, while restoration-oriented coping involves adapting to new ways of life. We identified six main themes: troubled deaths (guilt, anger and unanswered questions); mourning, memorialisation and death administration; mass bereavement, the media and the ongoing threat of the pandemic; grieving and coping (alone and with others); work and employment; and support from the health and social care system. Examples of loss-oriented stressors included being unable to visit or say goodbye, the sudden and traumatic nature of many deaths, and restricted funeral and memorialisation practices. Associated reactions were feelings of guilt and anger, and problems accepting the death and starting to grieve. Examples of restoration-oriented stressors and reactions were stressful death-related administration and severely curtailed social networks, support systems and social/recreational activities, which impacted peoples ability to cope. Study results demonstrate the exceptionally difficult sets of experiences associated with pandemic bereavement, and the utility of the DPM for conceptualizing these additional challenges and their impacts on grieving. Our analysis builds and expands on previous use of the DPM (Stroebe and Schut, 2021) in explicating the impact of the pandemic on bereavement. We make recommendations for statutory, private and third sector organisations for improving the experiences of people bereaved during and following this and future pandemics.