Background Older people with frailty are susceptible to sudden and rapid deterioration, so discussing their wishes and preferences for care at the end of life should be a priority. However, frailty is often not considered or recognised, which impedes patient-centred decision-making.

Aim To explore the views and perceptions of senior healthcare professionals regarding the usefulness of the Clinical Frailty Scale (CFS) in identifying frailty; whether a CFS score of severe frailty leads senior healthcare professionals to recognise that the person is likely to be approaching the end of life; and whether a CFS score of severe frailty prompts senior healthcare professionals to have conversations about advance care planning and end of life care with patients.

Method Semi-structured individual interviews were undertaken with seven senior healthcare professionals at one hospital in England. Data were analysed using thematic analysis.

Findings Frailty appeared to be complex, multifaceted and at times difficult to identify. A diagnosis of severe frailty did not necessarily prompt advance care planning and end of life care conversations. Such conversations were more likely to happen if the person had comorbidities, for example cancer. Prognostication appeared to be challenging, partly due to the gradual and uncertain trajectory in frailty and a lack of understanding, on the part of healthcare professionals, of the condition and its effects.

Conclusion People with severe frailty may be disadvantaged in terms of receiving appropriate end of life care. Better education on frailty for all healthcare professionals would facilitate conversations about advance care planning and end of life care with patients diagnosed with severe frailty.