Route 20 -The Go-ahead Takeover begins

The 20 commenced operation on 7 September 1968 as a replacement for route 38A from Loughton to Leyton with an extension to the newly opened Walthamstow Central station on the Victoria Line. At the time of the route 20 introduction, there were already two other routes in the Loughton area with 20 numbers, the 20A and 20B. As the new route ran parallel with the 20A for many miles, the new route was titled 20.

In 1986, the route was tendered out to Eastern National after Loughton garage closed, with their CityBus subsidiary operating the route from a base in Walthamstow. The contract with Eastern National lasted until 7th March 1992, when Grey-Green won the contract operating the route from Barking (DX). In the late 1990s, Cowie Group (which owned Grey-Green) rebranded themselves as Arriva. Between 1st June 1998 and 9th March 2002, Capital Citybus (Now First London) operated the school journeys from Northumberland Park (NP) and later Hackney (H).

On 26th April 2003, the route was converted to low-floor operation. When the contract was renewed on 24th March 2007, the route was moved to Edmonton (EC) depot

Blue Triangle has gained the contract of route 20 and from 24 March 2012 operating it using new Volvo B9TL 10.5m / Wright Eclipse Gemini 2's.

Go-Ahead London - WVL466 - LJ61 NVB - Route 20

Go-Ahead London - WVL463 - LJ61 NUX - Route 20

Go-Ahead London - WVL457 - LJ61 NUM - Route 20

Go-Ahead London - WVL462 - LJ61 NUW - Route 20