If you are having technical difficulties receiving any of our channels, we'd be grateful if you could let us has as much of the following information as possible when you write to us, so that we can fully investigate.
Name, Postcode, Town or City, Telephone Number (in case engineers need to contact you for further information)
For digital, satellite or cable
Q: Is the problem on Channel 4 only or does it affect other channels?
Q: Who supplies your signal (Sky/Cable/Freeview)?
Q: If cable, which company?
Q: If Sky or Freeview, what is your set-top box model?
Q: How long has the problem existed?
Q: Does it affect only picture, sound, or both?