44 votes for the HST and a 225 in 2nd place? Nonsense. It seems there is some serious nostalgia going on here.
Best UK high speed trains are: Eurostar E320, Eurostar E300, Javelin, IET in that order. No debating that in my view.
Eurostar trains cannot be used by UK passengers between two UK stations. Therefore irrelevant. But they do qualify in a best International high-speed train survey.
The Class 395 is a great high-speed commuter train - particularly if you live in Ashford or on the Kent Coast stations served via Ashford. However, the interior is as dull as ditchwater and there are no amenities on board. It has a limited range of operations and destination compared to say an IET.
And would you choose a Class 395 over a pendolino on the WCML? Seriously?
You have to ask the question, what train currently running today can reach every destination on the UK Intercity map and provides the best overall passenger experience - including comfort and ride. So the train has to be bi-mode or diesel.
For the average passenger, the shiny new bi-mode IET will do the job. The enthusiasts choice will usually be the HST due to the comfier looking seats, and lack of engine /electrical noise.
Probably the best train would be a modern HST2 with bi-mode or trimode power cars/power packs and a comfort level approaching the LNER Mk3/MK4 XC Mk 3 standard of seating, windows lining up with tables etc. But as it doesn't exist yet, we are stuck with HST. This is the only train that currently provides the best level of passenger comfort and can reach EVERY destination on the UK Intercity network. it is the winner for that reason.