Spectacular Cycling Viaducts in the UK

I’m on the lookout for the most dramatic viaducts you can cycle or walk across, in the UK. A bit of Googling hasn’t revealed a definitive list, so I’m building up on here – suggestions welcome.

So far, I know about:

Howsgill Viaduct, near Consett in County Durham. 50m high, 210m long.
Thornton Viaduct, near Bradford. 40m high, 120m long.
Headstone Viaduct, near Bakewell in the Peak District. 15m high, 90m long.
Larpool Viaduct, near Whitby in North Yorkshire. 60m high, 320m long.
Bilston Glen Viaduct, near Bonnyrigg in Midlothian. 50m high, 130m long.
Lambley Viaduct, near Haltwhistle in County Durham. 30m high, 260m long.
Smardale Gill Viaduct, near Kirkby Stephen in the Pennines. 40m high, 220m long.
Leaderfoot Viaduct, near Melrose in the Scottish Borders. 40m high, 250m long.
Cefn Coed Viaduct, near Merthyr Tydfil in Wales. 35m high, 220m long.
Hewenden Viaduct, near Bradford. 35m high, 340m long.
Blaen Y Cwm Viaduct, near Trawsfynydd in Wales.
Hengoed Viaduct, near Strad Mynach in Wales. 35m high, 260m long.
Hockley Viaduct, near Winchester. 10m high, 610m long.
Firth Viaduct, near Penicuik. 20m high, 100m long.