Designed 1967. This even cancelled as a pre-launch logo when replaced with the 1968 logo. Only seen on production captions on school programs made by Yorkshire before it started its franchise. From https://www.transdiffusion.org
Yorkshire Television began in 1968, after the northern franchise was split, with Granada Television continuing to broadcast to the north-west. Two companies applied for the new franchise; "Telefusion Yorkshire Ltd" and "Yorkshire Independent Television", the companies eventually performed a 'shotgun marriage' becoming Yorkshire Television. Their symbol was the Chevron.
During the beginning of the 1970s, ITV broadcast in colour for the first time. In 1987, Yorkshire aired its Liquid Gold ident, which at the time cost £40,000 (~£110,000 in 2019) to make.
In 1989, ITV made their first generic look. After 1990, this version was only used on programme slides until 1994.
With the beginning of the 1990s, the triangle was dropped probably due to only one part of the symbol on the triangle. The logo zooms into the screen after the ITV logo forms.
ITV became ITV1 on 11th August 2001. This is an example of the Yorkshire version.
In 2002, the Chevron was dropped after 34 years of the symbol.