Usually London buses are red. Although I think you know the answer because you stated it in the question.
The colour of a London double decker bus is Red
The colour of every London bus is red.
Mostly White and blue stripe
They are traditionally red.
Black
red
'Double-decker' buses have been used in London since the days of horse-drawn buses. Red has been the accepted colour of London's buses since 1933 and the famous 'Routemasters' with the rear boarding platform first entered service in 1956.
London Buses was created in 1999.
Most London buses are powered by an internal combustion engine fueled by diesel.
A London bus does not have a gender.
No, there are single deck buses as well.
Single deckers, double deckers and bendy buses
Red
So they can be more easily spotted and recognized as buses in traffic.
Visibility and distinction. It's a highly visible colour, and it's distinct in that it is the colour associated with school buses.
Not after 09.30
About 8000
The female voice of the red London buses that records the annoucments and the bus stops comes from Emma Hignett. Emma Hignett put herself forward to record the annoucments in the red London buses, they are still heard today.