Oliver Valentine – Wikipedia

Oliver “Ollie” Valentine is a fictional character from the BBC medical drama Holby City, played by actor James Anderson.He first appeared in the eleventh series episode “Proceed With Caution”, broadcast on 9 June 2009. Oliver was introduced alongside his older sister, Penny (Emma Catherwood), as a Foundation House Officer 1 (F1) on rotation at Holby City Hospital.

https://en.wikipedia.org/wiki/Oliver_Valentine