The service started with a small audience, limited largely to the London area via its weekday franchise-holder Associated-Rediffusion. The service expanded as stations were added to the ITV network, and continued for the next 30 years, broadcasting a schedule of memorable documentaries, drama and entertainment programmes aimed at children between the ages of 5 and 18. These were almost all made by the various companies of the ITV network, mainly the largest ones such as Thames Television, ATV, Central Independent Television, Granada Television and Yorkshire Television.