On Sun, 1 Nov 2020 10:52:05 +0000, Tim Lamb wrote:

Why intermittent? Surely an aerial/weather fault would be permanent.

Naw.
Sustained wind holds something in the fault position, until it drops.
Wind makes other things wag about causing varying multipath.
Rain penetrates cable/connenctors and drains/dries out.

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Cheers
Dave.