Then, in 1906, George Samuel Dicks of the London Motor Omnibus Company decided that, as the line name 'Vanguard' had proved to be very popular, he would name all lines 'Vanguard' and number the company's five routes 1 through 5.The numbering was revised in 1934 after London Transport was formed:[2] All routes operate in both directions unless detailed.Route numbers from 900 to 999 represent mobility buses; these mostly provide a once-a-week return journey to a local shopping centre from relatively low-density neighbourhoods where there is no alternative route in the main bus network.This is normally to provide a night service to destinations served by tube or train during the day.There are two special Transport for London express routes that run annually during the Notting Hill Carnival.