The older spaceship type Status' are rubbish on digital.
Wherever we go, we usually get some sort of picture on Analogue, but it is never exactly excellent. However, when we try to tune in the digital, we are always confronted with the "check antenna cable and connections" message, meaning it hasn't picked up anything at all.
This problem has been partially rectified by purchasing an A-Frame aerial (the one on the pole). This does pick up most of the digital channels, the BBC's and ITV's etc, but we never seem to get as many channels as at home.
I think if we were buying all our equipment again, we wouldn't bother with the dedicated "caravan" aerials, they all seem pretty underpowered for digital. We would just buy a house aerial, and connect it to the awning channel on the other side of the van using the brackets you can get out of Towsure.