It probably would indeed, one from the ex-1101 - 11 batch. As you say they didnt last long: living in Hull and regularly being at Doncaster, York or elsewhere on the ECML, these machines were always around and yet I dont knowingly remember seeing one in green TOPS.
Despite Bob's preoccupation with this blue/green crossover business, I do believe it is almost always down to light/emulsion, combined with natural changes in the paint as it ages and weathers. If you think about it in general terms, dark green and dark blue are in any case colours which are very easily confused in poor light. I have slides of my own from this period which show this blueish tinge, yet I know the locos were indisputably green when I took them.
I dont personally think there's *too* much mystery about 24147 either - as you say, lots of 47s went through Crewe immediately pre-TOPS with patch painting, revarnishing and application of asymmetric numbers and yet looking as if they'd had a full repaint.
Lasted long enough in theory, yes, but I'm inclined to suggest that the ScR was quite ambivalent (or at least inconsistent) about applying FYEs. A while ago somebody was asking for pics of any ScR 20s in GFYE and I dont think anything came up - most if not all of the native locos went from GSYE straight to blue, or were transferred to the LMR during that period. The Claytons and 27s probably go against this (which is why I say inconsistent) and yet only one or possibly two 26s are known to have been done - further evidence perhaps that Inverness at least wasnt in too much of a hurry about it.