There are still 390s running on the route, mostly during the early morning peak hours and on the few scattered xx:08 services throughout the day. Of the 21 planned services listed on Real Time Trains, 13 are 807s, and 8 are 390s, and of those 390s only one is formed of nine coaches (the 09:08). So it almost works out at an evenly split allocation, and the extra four services from September will actually bring it to almost half (13 Everos vs 12 Pendolinos).
As it stands now there is actually more capacity on the London-Liverpool route compared to the previously hourly services, assuming my following maths works out (I did use a calculator as well).
- 13 seven-coach 807s with 453 seats give us 5,889 seats throughout the day.
- 7 eleven-coach 390s with 607 seats gives us 4,249 seats throughout the day.
- 1 nine-coach 390 with 469 seats brings the total 390 capacity to 4,718 seats.
So all together the thirteen 807s and eight 390s running the current allocation gives us 10,607 seats throughout the day, whereas if we removed the current xx:08 services and had hourly eleven-coach 390s we'd have 10,319, bearing in mind that not all Pendolinos running the hourly Liverpool trains were actually eleven-coaches long, so the actual number would've been lower.