For a time frame, 158835 went in for ERTMs on 28 June.
158840 is the only ATW 158 not yet treated [may have gone in for mods in intervening period].
There are 13 ATW 158s still in silver:
158819
158825
158826
158827
158831
158832
158833
158834
158835
158836
158838
158839
158841
No idea if they will be the first for refurbishment and thus finally the ATW livery.