 During his time as leader, Whitby has been responsible for the slogan "Global City, Local Heart", a brand which commonly appears on Council documents and marketing material.It has been described as a simple phrase which captures the fact that as a city of over a million people, Birmingham can be one of the world's great cities, but an integral part of what makes it great is the diverse individuals which make up the population.Whitby has been closely linked with the development of the Birmingham Big City Plan.