“I felt as if I had lost myself and wouldn’t ever be the same again” . Amy’s experience of depression is common, and it can cause a persistent feeling of sadness and loss of interest in things you once found enjoyable (Uphoff et al., 2020a). Depression can have a long-lasting effect on patients and their families, and it is common in people with long-term physical conditions. Suffering with your physical health can affect your mental health, and people with mental health problems may struggle to cope with a physical health problem (Uphoff et al., 2020b). Treatment of depression can include antidepressants and a range of psychological therapies (talking therapies), including behavioural activation (BA) and cognitive behavioural therapy (CBT). How might Behavioural Activation Therapy help? People with depression can become less active because of the loss of enjoyment from activities, or because they are suffering from a long-term physical condition, and this …