Go-Ahead London is a major bus operator in Greater London. The name first appeared in August 2008, before which the company had traded under separate names and brands. It is currently the largest bus operator in Greater London, operating a total of 153 bus routes mainly in South and Central London as well as some services into North and East London with a fleet size of over 3,200 vehicles under contract to Transport for London.

The Go-Ahead Group Limited is a passenger transport company based in Newcastle upon Tyne, England. The majority of its operations are within the United Kingdom, Ireland, Australia, Singapore, and Norway. Go-Ahead was formerly listed on the London Stock Exchange prior to being purchased by Kinetic Group and Globalvia by 2022.