Usually London buses are red. Although I think you know the answer because you stated it in the question.
'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.
London buses are commonly referred to as "London buses" or simply "buses." They are part of the Transport for London (TfL) network and are known for their iconic red color and double-decker design. The term "Routemaster" specifically refers to a classic model of London bus that has become a symbol of the city.
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
Visibility and distinction. It's a highly visible colour, and it's distinct in that it is the colour associated with school buses.
So they can be more easily spotted and recognized as buses in traffic.
Not after 09.30
About 8000