The impact of implementing the European Working Time Directive (EWTD) and the consequent reduction in hours of work has led to concerns about training. This retrospective study compared total caseload, obstetric caseload, out-of-hours caseload and supervision levels of trainee anaesthetists in one region of the UK (Wessex) before and after the implementation of EWTD compliant rotas. Anaesthetic trainee logbooks submitted at the annual Record of In-Training Assessment were compared between the years 1999 and 2006. The logbook data was divided into two groups, group A (13-h shift) and group B (24-h on-call rota). There was no difference in total caseload, obstetric caseload or supervision. Out-of-hours caseload was greater in group A (p < 0.01).