LGW-OAK on 24/2, WTP to CW, £464. Not taken it yet (although tempted), the non-POUG upgrade price had risen from £1400 to £3400 in the past week. I think I've only seen one other POUG on this route mentioned in the thread, and that was OAK-LGW. I think this is post #90 for me, so I should edit the wiki myself...
Edit: Also meant to mention it's showing on the Android app and MMB, but not in the iOS app for some reason.