Jupiter research have called for Internet TV services such as the recently launched BBC iPlayer and 4oD (channel 4) and Sky Anytime to restrict 'catch-up' controls.

The problem is that both customers monthly data usage and browsing speeds can be affected by these services as they continue to run after they have been closed. As they are based on Kontiki peer-to-peer software this means they they continue to both upload and download data in the background without users knowledge.
This isn't a problem with similar software such as Skype and Joost as these have the option of turning the software completely off.

"Many will notice that their internet connections may be running slower, but will not necessarily know why," claims Ian Fogg of Jupiter