How to get into the abandoned unknown station in MTG

There is an abandoned sub-surface station in Mind the Gap. It was open in the classic version of the game, but was closed. Due to it having no station name, we will simply refer to it as "Art Gallery" station. It had 2 side platforms. In the new version of Mind the Gap, the platforms and signs are still intact, but the entrance sealed up, now occupied by a bank. So here's how to get into the abandoned sub-surface station:

1. Go to Ardwick Station
2. Go to the west end of the platform, or the left corner of the triangle
3. Go walk on the tracks
4. Go on the platforms
5. You're there.