In message , "Dave Plowman (News)"
writes
In article .com,
wrote:
Well, I will be. It's for an external aerial wire. Actually two
aerials, digital terestrial ('Freeview') and FM radio. I think I'll put
it just above ground level so the cable emerges into the cellar.

Any advice? Thanks.

Is there an airbrick or ventilator grill close?

Bad boy - you're not meant to put wires or pipes through air bricks

--
geoff