According toGraham Road Curve (Hackney)
https://www.railforums.co.uk/thread...ure-built-post-ww2.207205/page-2#post-4698454, 'The curve is still open, complete with OHLE, but only used by occasional movements.'
Thinkig about lines closed ony to passengers, what about the curve enabling trains to run from Waterloo onto the West London line? I think it had regular passenger trains for a few years when the Cornish sleeper and one or two trains from the north ran to Waterloo to connect with Eurostar.