Quote:
Originally Posted by zc1
Hi,
Further Update
The line seem to have good noise free at the moment, so have cancelled engineer and will keep a close eye on it.
Thanks for all your help 
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Could be weather related (expansion, contraction or water leakage in the joints)
Could even be something in the transmission network, although I'd expect that to be fixed pretty sharpish since it would affect everyone else using the same route so it would get noticed pretty quickly.