On the morning of 23 October 1975, the peace and quiet of a street in Kensington, West London was shattered when an IRA bomb was detonated. The blast killed Gordon Hamilton Fairley, the UK’s first Professor of Medical Oncology - a man who had dedicated his life to fighting cancer. His untimely death was a devastating blow not only to his family, but to a medical community that relied on his insight, his scientific vision and his compassion. Now 50 years on from that tragic event, John Crown talks to two of Gordon Hamilton-Fairley’s colleagues - Professor Tim Oliver and Professor Ray Powles. John also chats to journalist Eamonn Mallie about other health care workers killed in the Northern Ireland troubles.