Advenza 47's at Darlington

[Darandio]

Just been to Darlington where Advenza Freight 47237 & 47375 were stabled next to platform 1.
Apparently 237 arrived yesterday and 375 joined it today. I saw them get coupled together but had to leave before they went anywhere.
Could anyone tell me where they were heading next?

 

[Phoenix]

If it was the 57's i would know but the 47's are usually doing special workings like power car moves i dont think they have designated workings.

 

[Mintona]

They've gone to Tyne Dock now apparently.
Ta ??

 

[The Planner]

I thought Advenza sat their locos at Gloucester ??

 

[Darandio]

Must admit i found it strange to find two arriving on separate days at Darlington but presumed there must be a stock move ready for them, plus the fact that they apparently went to Tyne Yard backed this up for me.
Still at a loss to explain why 47237 was held at Darlington overnight though.