That’s Monsal Head Viaduct in Derbyshire, somewhere that I am very familiar with. That trail is obviously both highway=cycleway and an abandoned railway**. (not dismantled or razed so not subject to to the suggestion at the top of this thread, but worth mentioning for what I’m going to say next).
The ways on the route used to have “railway=abandoned” tags until https://www.openstreetmap.org/way/1101430653 was added to duplicate the current cycleway with an old railway. This is wrong for a number of reasons - there is only one feature here, not two (it was a railway, and is now a cycleway), and the “former railwayness” of the cycleway has been lost.
I suspect that this issue is not widespread around the world, but I have been “bucket and shovelling” it in various places in England that I’ve been.
** edit to add why this is particularly useful: Until the tunnels were reopened when walking from Matlock to Buxton you had to scramble over the top of the hill that the tunnels cut through. The information that it was a former railway means that everyone and their granny can walk it without problems, something that absolutely wasn’t the case before.