Odd signal issue

Sounds a bit like your 'bodies' are acting like part of the antenna,  similar to the old ign-key to the head syndrome!

We get interference on the TV picture if Liz walks past it, I dont seem to affect it.   Not an issue at the moment TV is opened up on the bench at the moment has an iffy joint on the DC input socket

Hi

You’re a great tub of fat and water
 
Not meant an insult but as far as RF is concerned it’s true. As such you are good absorber of radio signals.

Several possible reasons but probably:
 
In a good signal area you are getting the signal direct from the transmitter along the direction of the aerial. You may also get a proportion of the signal reflected from the surroundings, but this proportion of the signal is very small and a good aerial will tend to reject them.
 
In a poor signal area you may get little or no signal from the direct line of the transmitter and the aerial is receiving mainly (or only) the reflections. There can be multiple reflections coming in from different directions. When you move around the van you absorb some of the signals and change this multi path reception to the point where the signal drops below the minimum needed by the receiver.
 
Incidentally this is one of those weird situations when a omnidirectional (flying saucer type) aerial may out perform a higher gain directional.
 
Funny stuff RF

Thanks, that makes complete sense. We've had it before but this is the first time it was obvious and we could repeat the signal blocking. I was wondering about making myself a tinfoil suit but perhaps that's going too far   We've moved site and getting 100+ channels so it's not a problem any longer.