I switched off a friend's router (Plusnet customer) & disconnected it for 8 hours today. When I switched it back on, I checked the broadband usage and compared it to immediately prior to switching off, and found it had jumped by 16MB in that time. The breakdown shows more than half is web traffic, and the next highest is streaming. I don't know why that should be. Any advice on if that's expected? If so, why? Thanks!