And if the lines came down somewhere else, even all that work would be useless..
Well, the ECML does have quite a few options, loads of lines til Ally Pally, then you have the Hertford Loop which has often proven useful (they really need to reduce headways between Hertford & Langley Jn tho'), Stevenage to Hitchin is a bit of a weak point, then you have the Cambridge line, Peterborough to Werrington Junction is a bit of a weak point (but, again you do have multiple lines), then you have the Joint Line, which joins up at Loversall Carr but you have many lines from there to Donny, and then the Leeds line diverges, then several routes to get to York including via WKF & Leeds, or via the Kirkgate avoider & Castleford, or via Askern & Church Fenton, or via Hambleton West Jn & Gascogine Wood, or the Selby avoider, in addition to the main line, and multiple tracks where they all join up at Colton Jn to York and on to Northallerton, where the slows diverge, and you then have the coast & Stillington in addition to the main line...
...but, of course, none of the diversionary routes are electrified. This is quite unlike the WCML where almost all of it is (even via Kidsgrove which was done specifically for West Coast route modernisation).
Anyway, yesterday GC ran a 2055 additional KGX -NCL, this had was the last time a Valenta powercar (43123) would lead a service train, and this called at (via Cambridge & Ely) PBO, DON, YRK, THI, NTR, EAG (via Stillington), NCL. Any passengers wanting the 2100 who hadn't taken advice to not travel or travel earlier were able to get this train. The guard signed the route but the driver needed a route conductor as far as Peterborough. I've actually been via nearly all the possible ECML diversions on GC or EC, so well done to them for doing the diversions, but they need to get more drivers signing those routes if they are to avoid having to call in many dozens of buses.
Today 1D45 1803 KGX - SKI (departed 1834) failed north of Peterborough, and was stuck for over an hour. The 1800, which had departed at 1840, had already overtooken it at PBO so wasn't affected by this particular problem, but the 1830 (which departed at 1843) was right behind so got stuck as well (I was going to try to get this train at Donny from Sheffield but fortunately I went back via Leeds instead) however the 1835 which also left at 1843 was able to overtake, as did the 1819 which left at 1852.
Going south, the late running 1E23 1550 GLC - KGX failed in the Berwick area at around 1900ish, causing the following 1E24 1450 ABD - KGX (which left EDB at 1800) and 1807 EDB - BHM to be stuck behind this train at Berwick. The 1835 was cancelled throughout and the 1750 from Glasgow (departed 1822) to London spent 2 1/2 hours at Edinburgh and is, as I type this , nearly 4 hours late south of Dunbar, and expected into KGX at something like 0400 - if it makes it!