The double decker trams are certainly unusual. How do they prevent passengers from electrocuting themselves on the one with the open top?
The overhead line is sufficiently high that there is no risk of arcing electricity.

Thanks for the link about the Blackpool boat tram, WalkerK. I remember riding on the boat trams in Blackpool when I was younger, but nowadays when I visit Blackpool all the trams which I see are enclosed single or double deckers.