“Manufacturer has tilt if DFT has coin”
They could have had tilt if they were willing to fund an entirely bespoke design. Given the plans for HS2 when ordered it didn’t make any sense to spend a huge amount on what would be legacy trains on the WCML. Now it looks like a bit of a mistake given how much HS2 has been scaled back.
The 390 replacement project will be interesting.
Even though HS2 has been scaled back I still don't expect any 390 replacements to be tilting trains. As I understand it that would mean Alstom would need to rewrite TASS, and any other manufacturer would need to adopt it or create their own form of tilt signalling. Plus tilting trains are heavier and it seems a lot of operators don't think of them as a worthy investment even without phase 1 of HS2 removing some of the curves. This includes the present 805s which could possibly be approved for 125mph running without tilt.Avanti wasn't going to buy a large fleet of 50+ trains like the Pendolinos, so the unit price would make it unviable for both supplier and TOC.
HS2, on the other hand...
Now route upgrades north of Handsacre/Crewe are out, I think some on the railway are regretting not pursuing a tilt option.
Alstom and others are still building tilting trains elsewhere.