Re: Why do it anyway?
This red herring keeps coming up. It has nothing to to do with interference on nearby TV channels.
The spectrum associated with TV used to extend to 860MHz. As part of the digital switchover Ofcom reduced this to 800MHz, and sold off the higher frequencies for 4G. A lot of people who were out of range for pre-DSO Freeview installed aerial amplifiers to bring weak signals up to viewable levels. many of these installations used amplifiers which covered the whole 470-860MHz TV band, even when that wasn't actually necessary .
If a 4G signal in the newly-released band above 800MHz is strong enough it will cause the amplifier to overload, and when that happens any channel within the amplifiers passband can be affected, not just those that are "near" to the 800MHz top end.
I would expect any arguments here to centre around whether the amplifier was required to get local TV, or was installed as a way of getting a weak signal not intended for the given reception area. In the former case full compensation should be forthcoming, in the latter case I suspect you're on yoiur own.
This all sounds so like the power-line comms issues. Its funny how people don't care about interference when a service they like interferes with "a few beardies" , but get so upset when a service they don't care about spoils their reception of Corrie. At the end of the day, it's the same situation, well designed radio gear won't interfere with well-designed equipment. If it does, action should be taken against the user who causes the interference.