Therapy sessions: each participant will be attending six face-to-face sessions over a period of eleven weeks in the hospital. Each session will last for about one hour, where the participant will meet a therapist (a clinical psychologist) of this intervention. With the support from the therapist, the participant will work through an intervention manual to learn skills to overcome their problems related to fatigue, especially for physical activity, mood and sleep. There will be intervals of two weeks between sessions. During the intervals, the participant will be asked to keep a diary to record their daily activities and sleep, to put into action things they have agreed with the therapist (including doing more activity), or to read sections of the intervention manual.