Thank you. I do not dispute the fact that there has existed a railway here before.

According to the wiki, https://wiki.openstreetmap.org/wiki/Key:railway the "railway=abandoned" should only be used if the "course is still recognized through embankments, cuttings, tree rows, bridges, tunnels, remaining track ties, building shapes and rolling or straight ways."

In my opinion, none of this is visible. You could argue the southern part (next to the river, where there is a foot & cycle path) could pass as a clue, but it is far-fetched.