Since things are getting a little complex now. Heres a list (because I know you all like them)
All units are owned by Angel Trains. Built in 2010.
172001 Leased to West Midlands Trains, Sub-leased to Arriva Rail London (LO) In service London Overground Livery
172002 Leased to West Midlands Trains At Tyseley for testing Unbranded London Overground Livery
172003 Leased to West Midlands Trains At Ilford for fitting of Toilet Unbranded London Overground Livery
172004 Leased to West Midlands Trains, Sub-leased to Arriva Rail London (LO) In service London Overground Livery
172005 Leased to West Midlands Trains, Sub-leased to Arriva Rail London (LO) In service London Overground Livery
172006 Leased to West Midlands Trains At Tyseley for testing Unbranded London Overground Livery
172007 Leased to West Midlands Trains, Sub-leased to Arriva Rail London (LO) In service London Overground Livery
172008 Leased to West Midlands Trains, Sub-leased to Arriva Rail London (LO) In service London Overground Livery
All 172/0s are to be released from London Overground by March.