Any vodafone staff able to assist me in tracking down some unusual usage on a connection this afternoon? Normally does 1-2gb a day, did 17gb in 3-4 hours this afternoon and everyone in the house swears there has been minimal usage. 

Cable connection with static IP, firewalled, both WAP's are secured with WPA2, all PC's have up to date AV protection etc.

I can see WHEN from the TCL client zone but I can't see where or what the traffic was, any assistance would be appreciated.