More Capitalstars delivered?

[googolplex]

Having read other threads I could be mistaken - all I've seen are flashes of London Overground livery go past the window!
Anyway - new London Overground trains have been going along the Bedford-Bletchley line, are they Capitalstars or 172s, and what are they up to?

mods: could you change the title please?

 

[Voyager 2093]

Definitely a 172. 172001 to be exact. I believe it is doing a mileage accumulation run between London Euston and Milton Keynes until tomorrow.

 

[googolplex]

Ah, so I've only seen one, not several. I've only seen it go one direction, which threw me.