It's got to be better than continued stangnation with the current number of units available, and the threat that the 180s could go elsewhere at any time. Better than nothing, and as you say Brantastic, the 7 142s will be more flexible for diagramming than 3 180s.
The bit of the London Midland cascade that is puzzling me is that the 150 numbers don't seem to add up: I've worked it out thus:
Currently, London Midland have 14 class "150/3" units (Not a real designation, but that's what I'm using to denote the three carriage 150/1 plus half a 150/2 sets).
These break down into 14 class 150/1s, and 7 150/2s. So that's 42 individual carriages.
Plus, they also have 10 two-car 150/1s, and 2 two-car 150/2s. Plus the two three carriage 150/0 prototypes. That's a further 30 individual carriages.
So in total London Midland have 72 class 150 vehicles, right?
Now then; London Midland are reported to want to retain around 26 class 150 vehicles (13 two carriage units). Northern are getting 8 150s from LM, and FGW are getting 9. So that's a total of 26+16+18 vehicles. That only comes to 60.
What has happened to the remaining twelve carriages?
The way the cascade has been reported, it suggests that it is taking place based on the 150s being cascaded as two car units, as opposed to the units going as three-car hybrids. So I'm slightly perplexed. Surely there is scope for more units to be freed up than are being, even if London Midland do retain some vehicles?