In the UK, as elsewhere, continuing professional development is seen to be a necessary professional activity. However resourcing is problematic and funding varies between employing agencies. The 23Things programme has evolved to address these constraints. In particular it reduces the time for staff to be absent from core functions and makes maximum use of peer support. Within a common structure the programme delivers development to personnel at all professional levels. Activities are learner defined and relevant to their personal context. The pace of progress is learner determined. Cambridge University Medical Library (CUML) has designed its own 23Things programme. While conforming to the general model of 23Things, CUML adapted the programme in three ways. 1. to meet the specific learning needs of the library staff 2. to select topics and tasks related to the subject focus of the library 3. to include a new strand of professional development called Follow That.. Follow That... was designed to foster better understanding of each team members role in delivering core services in the library, and to improve the integration and awareness of expertise within a relatively large team This paper will describe the way in which the programme was set up, the selection of tasks and activities, and the pitfalls encountered. Also included will be an overall evaluation of the programme from the perspective of the participants and the programme designers.