Local news reports indicate UPS aircraft are being isolated here at SDF as well.
News is indicating the "London" flight came from EMA (East Midlands) -- seems to be an EMA-PHL flight in question. ?
UPS also operates at STN -- a UPS flight did originate at STN last night, but arrived at SDF just after midnight per FlightAware.
Most other flights are from CGN, UPS's European hub.