<p>Some stations built by the Metropolitan Railway have platforms which are so short that the train extended a little beyond the station.
</p><p>I do not remember the name of the station here - it will be Bayswater, Notting Hill Gate or the Paddington station nowadays used by Circle &amp; District line trains.
</p>
Probably the passenger part of these trains did fully fit the platform in the days when these trains were brand new and  passenger doors were operated by a guard located at the back of train ... but the conversion to 'driver only operation' required the stopping point to be moved back so that the front of the train (including the train drivers' cab) was fully in the station - resulting in the situation as seen here.
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