....including a blue class 37 on the 0658 Hawick-Edinburgh.

As David Cross says in the caption in Last Years of the Waverley Route, pictures of EE Type 3s on the WR are extremely rare. Since Stuart's post above on Waverley Route new image links I've still only come up with these four:

i. the latest published one - unidentified early BFYE at Stow on the 0658 Hawick - Edinburgh

ii. D6838 - GSYP at Whitrope (on Railscot and featured on the WR picture links thread)

iii. unidentified FYE body colour not known on up class 4 at Steele Road (published, cannot trace)

iv. unidentified BFYE in the freight-only period north of Hawick on class 8 (published, cannot trace)

The early blue livery distinction is important. Of the largest class of loco, Brush Type 4, only 19 received the variant (per my two - 1536 and 1547), and the first one to receive standard blue was in traffic in December '68. I have not seen figures for the 37s, but by my reckoning only about a dozen would have received early blue, characterized by the application of four double-arrows, squeezed beneath each cab window with the number above. Cramped and very wrong-looking, and consequently profoundly modellable.

The D-prefix was dropped on repaints in late August '68, so our Stow 37 will almost definitely have a D-prefix, even though she looks pretty ex-works. There's no equivalent class 37 web resource to Class47.co.uk so traditional methods are the only way into this. I turned-up split-box 6753 and 6797, centre panel 6831, non-boilered of 30A, and 6992 of Cardiff without the two clips above the headcode box. None of these fit the bill.

Until last night. Quite why I glanced in the 1973 Combine is unknown even to me, but there on p41 is 6845, still in the early blue she would have worn as a 64B machine in 1968. The clincher is the offset numbers, the Ds themselves have been removed or painted-out, but the digits are right-justified against the double arrow.

So, that's a definite where my models' i.d.s are concerned: 6845 joins the roster in eBFYE which will be a pleasure to recreate, her sisters will be green with small yellow panels and full yellow ends respectively.