Hi,
I have a couple of Fitall plugs in my collection I seem to recall that the instructions suggest squeezing the body of the plug together when using the plug in 2 pin 5 or 15 amp sockets.
As the body is quite sturdy it would be easier, but certainly very dangerous, to squeeze the actual plug pins together
I wonder if anyone actually ever tried this and received a nasty shock from doing so....
Andrew