Its turned up today and I don't think they will be dealing with them again. Trackers have the uses! Don't think any of them were against fitting them really.
No settings to switch them off in the radio menu. Unplug the module and put another plug on it with a new wire going to two of the terminals seems like the only fix at the moment. Don't fancy doing that every time I enter the forest, will keep trawling the net for an answer