This is along the riverfront at Swanscombe Marshes near Greenhithe. Swanscombe Pylon at 623 feet is, along with its twin across the Thames at West Thurrock, the highest in the UK and the second highest in Europe. See https://www.geograph.org.uk/photo/1692967 for the view from beneath.
TQ6076 : Swanscombe Pylon
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