I personally don't see why cards like this can't be listed under both teams, the one shown and the one with the "updated" info for, but the site guidlines definitely say they are to be listed under the team that would be considered "most current", which in this case would be the London Monarchs. I know for my personal collection why I collect certain teams, I collect both players shown with the team even with traded information, or players who have traded info saying the were traded to that team.