Anyone know anything about aerials/signals etc?

[unicorn]

We can get BBC no problem - but all the other channels are breaking up and not watchable.

If it was the aerial surely all of them sghould have problem?

They come on different signals

have they always been like this or has it changed?

in our sussex house we can't see E4 but can get E4 + 1 cos they come on different frequencies

ITV is on different frequency to BBC1

here is some info

here is some more info

Thanks for that...
all channels are ok again now (after we had a power cut strangely) it may be the set top box.