Thank you to everyone who emailed me. I am sending a fuller picture to the BBC that seems to prove the transmitter is at fault.
The internet, according to our engineer, is affected by the fittings on the pylons. The pylons in the village have apparently been condemned by Western Power and are to be replaced, at which point the fittings can also be replaced. Until this happens internet engineers are unable to climb the poles.
It would be good if the Parish Council got involved with this.