On the first Azuma "Chieftain" to Inverness, from Newcastle.
Noticed the smooth change to diesel at Bridge of Allan, an unobtrusive hum underneath.
Very brisk under the wires and I was interested to see how well they go on diesel. Mobile phone indications, so no assurance on accuracy. Passed Blair Athol at 53 and a steady 58-60 up the hill before picking up to near 80 heading to Dalwhinnie.
Much already said about the interior so won't risk too much repetition.
In First, a lot of single seats, headrests seem unduly large giving something of a boxed in feeling. A few clumsy connections with the table legs but soon sat in a more suitable position.
Was impressed by the red/green lights on the seat reservation displays, much easier for those without to find a spare seat.
Obviously need a few more journeys to get used to them and remember the seats which best match the windows.
But, the HST is a hard act to follow!