It seems to be an issue with the built in Freeview option in the tuner. Instead of the bar coming accross to select Red for catchup tv or green for Freeview I’m getting the 404 message. It’s overlaid over the program.
It could be that its looking for info on the program currently showing, ie. teletext? But it cant find it. It doesn’t happen on all channels. I’ll dig into the freeview options later and see what is there?