I can't find anything relevant in the issues I do have but a check of the online records for RPI suggests that this:
"Goin' Underground" (Jonathan Rowe) - A trip on London's tube will never quite seem quite the same again in this adventure for Metropolis' Kult RPG
https://rpggeek.com/rpgissue/94345/r...sue-2-feb-1994
might be what you are after?