Document four

Problems with double-decker trains

My own recollection of the units used on the various lines between Dartford and London is that they were somewhat claustrophobic, and the upper decks were uncomfortably stuffy, as the windows on that level were not made to open...These were possibly the reasons why people often preferred to stand on the lower deck rather than sit on the upper, thus causing more congestion and delay at stations than might otherwise have been the case. It was an ingenious attempt to solve a long standing problem which unfortunately didn't quite come off, due to minor, not major faults of design.

PERSONAL REMINISCENCES OF MR. P. ERWOOD (1983)