From a post in the wnxx forum, the 158 status in early December is intended to be:
7 x 3 cars:
158798, 158956-158961
11x 2 cars:
158745, 158747, 158750, 158751,
158760, 158761, 158762, 158763,
158764, 158765, 158766
Paul
Yes, it was changed so that the 7 remaining 3 car sets would be 798, 950-955; which did seem to be the case but I have now seen more information from
WNXX▸ suggesting that 952 and 953 were to be reformed imminently and I have just seen 158745 with 150261 on their way down to Penzance so this does seem like it has happened already as 745 was the 2 hybrid coaches from 952 and 953 which also means that 762 and 750 should now be out
Current 158s:
3 Car - 158950-951, 954-959 & 798
2 Car - 158745, 749, 750, 762, 763, 766, 767 & 769