Gareth presented the following explanation :

>
> It's even worse than that. The "follow me" personal number can route to a
> premium rate number. I was stupidly stung by this and ended up paying £4 for
> 1 call. The crazy thing about the scam is that the caller pays for the
> effectively diverted part of the call.
>
> Gareth.

I don't believe that!