OK, finally found it
Here is the pin in/out on the Hiline tuner. if you want to make the lead up yourself. From memory the pins are not populated on the standard set up. So you need to populate 4,5,6 and 15 on the white plug
4 is +sound
5 is -sound
6 is +vid
15 is -vid
just use a standard A/V cable
Then as mentioned in the post previous a digital box with remote.
Any digi box with twin aerials will give a better reception than one with a single aerial
When you select A/V channel on the highline and turn the box on.......there you go