On the point about how this would have been uncovered, the fact that it was actually key that it was William making a complaint directly to Scotland Yard, and that this had security implications, is fascinatingly clear. Anyone else going to the police with suspicions would doubtless have been told it wasn’t possible. Because even the phone companies thought it wasn’t possible. It needed someone of William’s standing and significance to be complaining for the police to actually put the effort in to figure out the truth.
The first step taken by DCS Williams was to establish whether or not a third party had been accessing the voicemail messages of Mr Lowther-Pinkerton and Ms Asprey without their permission.
At that stage Vodafone and O2, the respective service providers, maintained
that they had not appreciated that it was possible to listen to another person’s voicemail messages without their knowledge or permission. Indeed at that time none of the service providers admitted to being aware of this capability.
The evidence of DCS Williams was that it was only due to the tenacity of DI Kevin Southworth (now Detective Superintendent Southworth) who worked with Vodafone and their engineers that the police discovered how mobile phone voicemail systems worked. It was the case, apparently, that the service providers had limited ability to establish precisely what was happening within any given voicemail system. They could not, for instance, determine
whether a voicemail message (whether new or old) existed within a voicemail box at any particular time.
Although it was possible to identify outside or potential “rogue” numbers
dialling into a person’s voicemail box, the available software could not identify whether or not the “rogue” number had listened to any messages.They also could not assist with how often the illegal access was taking place or how widespread it was.
By 30 January 2006, with the assistance of Vodafone’s engineers, the police had established that a number of outside or potential “rogue” numbers had been calling in to Mr Lowther-Pinkerton’s voicemail box, using his unique voicemail access number.One of those “rogue” numbers was traced to Mr Goodman’s home address