On the buses

 Predictably there is a wash of WW1 stuff around at the moment, most of which goes straight past me as it falls into the brackets of overly jingoistic or bland and soapy.This caught my eye though. A photo piece in yesterday's paper on buses. The lower is the B Type converted into a loft for messenger pigeons.
The above threw up questions: captioned as 'London bus drivers taking their buses to the front'. It suggests that Indian bus drivers in London were certainly not a result of immigration post 1947 partition, but why are all the turbaned chaps inside the bus and all the pasty white boys outside? Or have they literally rounded up all the tubaned bus drivers in Belgium and stuck them on the bus as a joke?