Nope if the fuse in the 4 way goes as a PlusNet engineer you have only a few options open to you.
A) Wrap some Tin Foil around the Fuse and plug it in ( Nobody will know )
B) Put a 5A Fuse in and then state you are adding another 4way ( plugged into the first) for redundancy.
C) Cut the plug off and do the "Poke the bare wires over the two bottom holes and plug something else in" trick.
Pluscali No Need to Monitor your usage *
*Applies only to the first 2GB