I think that's an old pattern electricity distribution cabinet. Looks like a pre-MANWEB jobbie.
Usually they have a 3 phase supply incoming, then it's split up via busbars within the cabinet to single phase for distribution around the local streets.
Mmmmm.. Might include this on next week's lurk around the Wirral. I would agree with you dd about being out of use. As you say, if it was in service, it would be festooned with "Danger of Death or Worse" notices !!