John Stumbles wrote:
I want to re-route our existing TV aerial cable which presently drops
from the aerial on the central chimney down the roof and front of the
house. Rather than try to sling the cable over the roof to hang down the
back I plan to draw it into the attic and make an extension.

Since the above will presumably involve roof work anyway, wouldn't it be
possible simply to run a completely new cable from the aerial?

David