T4 was a scheduling slot on Channel 4 (T4 Saturday usually 9 am until 2 pm) and E4 (T4 Sunday usually 9 am until 5 pm). It also aired on weekdays in the school holidays. The slot had a separate station identification on screen graphic from Channel 4 and E4. The logo of T4 is noticeably the top right segment of the standard Channel 4 logo. Channel 4 originally produced the strand in-house until 2002, when production was passed onto independent companies.