On 19 Mar, 09:37, "Boltar" wrote:
Outside of a Harry Potter film , have triple deckers ever been used in
the UK (or anywhere else for that matter)? Is there any technical
reason other than height why they couldn't be used - centre of gravity
or passenger evacuation for example?

Triple deck road trailers are a major hazard on our roads in windy
weather. I doubt any insurance company would wish to insure a
passenger carrying version.

George