Combining chemotherapy and thoracic radiotherapy is the standard treatment approach in limited-stage SCLC with a combination of platinum compounds (cis- or carboplatin) and etoposide and cisplatin (PE) as the backbone regimen. Concurrent chemo-radiotherapy is superior to sequential treatment and early thoracic irradiation starting with first or second cycle of chemotherapy appears beneficial. Hyperfractionated accelerated radiotherapy has been shown to be more efficacious than radiotherapy given in a long overall treatment time. However, availability and routine-use of hyperfractionated radiotherapy remains a matter of debate. Therefore, in this trial, both radiotherapy schedules of accelerated twice-daily administration or once-daily radiotherapy are accepted. The choice of schedule is a stratification factor for randomisation.