I passed Willesden Junction a few days ago and noted that all three orphan Class 378 carriages had gone.
But also... I wish I had noted the number of the train I arrived at WJ on - this was a 378 that had the new style / colour scheme upholstery. I recall noticing it at Stratford when I boarded it. I suspect that it was one of the units which had been on the Goblin. The external livery was still the original colour format - with white between windows and roof.
What may be significant is that several hours later, when on my way home, I saw and photographed 378 206 at Finchley Road and Frognal.
I've put a copy of the image on Flicker... as seen below! Note the location of the train number - perhaps the only way to see (from the outside) that this was a Goblin unit