This paper examined Mindfulness exploring the theory behind Mindfulness, the effectiveness of courses and Mindfulness research. This summary focuses on the effectiveness of a TfL case study that was described within the report. Amongst employees who took the six week stress reduction workshop, which was a combination of Mindfulness, psychoeducation and CBT, a 71% decrease in the number of sick days for stress, anxiety and depression was seen over the subsequent three years. Sickness absence decreased by 50%. Additionally, 80% of course attendees described improved relationships, 79% reported they were better able to relax, 64% reported better sleep patterns and 53% stated they were happier at work. TfL identified that the two main health problems amongst employees were mental health and muscular-skeletal problems. Consequently, they established the course and any of the 20,000 employees could attend the course if they met the referral criteria.