Hi,
are you using an EE TV Box Pro ?
If so did you choose to set it up for Internet streaming or Aerial ?
I did the former when I first got mine and quickly found that a number of channels were missing because they don't have a license to stream them.
If you are already on an aerial, I discovered it is possible to have "too much" signal going into the aerial socket!! The first time I tuned the channels, I found that all the ITV channels were missing. I had previously read a comment about this signal level thing and although I was skeptical I thought "well I'll give it a try" so moved the aerial cable off the distribution amplifier that I have and onto the dual-socket where the aerial connection come into the living room. Re-tuned the channels and lo-and-behold they were all there!!
Hope this helps
PhilipJ
