On Mon, 20 Mar 2017 09:35:29 +0000, The Other Mike
Not only is 3.3kV used in the UK, but 2kV, 3.5kV and 6.6kV are also used. In
some areas 66kV is also used alongside 33kV, the 66kV being run in some cases on
wooden poles.

Plus this, page 4

https://www.westernpower.co.uk/docs/...-Midlands.aspx

WPD West Midlands also has extensive 66kV networks. These networks cover large
rural areas, including the north Cotswolds, Worcestershire, Herefordshire and
the Welsh Marches. Networks at this voltage provide economic and reliable rural
systems, permitting long feeding distances and being of robust construction.
However, some parts of the 66kV network are ageing and may require replacement
over the next 10 years. WPD would consider reinforcement at the 66kV voltage
level or conversion to 132/11kV transformation depending on the solution
offering the optimum technical and economic value.

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