and to a lesser extent ...
World War 1.


--

Indeed, the drivers of the London General Omnibus Company actually
drove some of their B class buses to the front in Flanders. An example
of such a bus is in the Imperial War Museum, and this is the reason
that its drivers and those of its successor, London Transport, and now
the privatised bus companies (ironically one of them being the
General!) are allowed to parade before the Cenotaph on Remembrance
Sunday.