Thanks Andrey, I do appreciate the time you're spending helping me. I'm not sure I properly understood what you suggested but I did the following: Cleared the contents of the content/speedcam folder and added the clean iGO_SCDB_Western_Europe.txt to it. I then went in to the Internal storage/iGO_Basar/privdocs/InappShop/Mount/speedcam folder and deleted the 0 byte speedcam.spud file and relaunched Igo.
This recreated the both the content/speedcam/speedcam.spdb and the Internal storage/iGO_Basar/privdocs/InappShop/Mount/speedcam/SpeedcamUpdates.spud (at 0 bytes)
Sadly the speedcams still report the wrong speeds.

Thanks again for the assistance, it's much appreciated.