Driver-only operation was introduced in January 1987 with double-deckers, and three months later the route was reported to be carrying around 20,000 passengers per day.

[3] On 22 June 2013, route 30 was included in the sale of First London's Lea Interchange garage to Tower Transit.

[6] In 2021, the service frequency during morning and evening peaks Monday to Friday was reduced from 7 buses per hour to 6.

[7] On 7 July 2005 at 09:47, a Stagecoach London Dennis Trident 2 double-decker bus, fleet number 17758, registration LX03 BUF, was involved in a terrorist attack perpetrated by Hasib Hussain, a bomb in whose rucksack exploded, killing 13 other passengers as well as himself.

The bus was off line of route and on diversion due to earlier multiple attacks on the London Underground system.