I regularly book in advance and request a seat in the quiet coach. I'm usually one of the first to book, but whatever I put in the system it invariably allocates 12A.
VT explained to the effect last year that the system allows a desirability value to be attached to each seat. The way the system works is by taking the matrix of values asked by the customer ie aisle, table, power point , and taking the best fit from a prescribed list of values, 1 per seat. The customers preference will be matched by the closest available match.
This system has 2 side effects, other than (in)effectively matching customer preferences;
1) it enables TOCs to block out seats for reservation, ie on VT coach E is un-reservable unless done right at the top by head office, to this extent the desirability value of these seats is 0, and the computer won't recognise them as seats that can be booked, as no-one wants them;
2) it means that TOCs can separate seats out, and book seats that no-one wants first. Thus low value Advance Purchase tickets can be given seats with a low desirability value, ie no view, no table. In the case above, A12A is obviously the one the system is told to chuck out first.
The only problem this then creates is that people booking off-peak returns etc get shafted with poor seats if they're not already booked when going through an online system. Going to the station gets around this issue.
Although interestingly, recently I have been able to get 'good' seat allocations on full price tickets when going online, but that wasn't occurring a while ago. Does anyone know if the system can differentiate between the differing ticket types? Ie Anytime or Advance?
--- old post above --- --- new post below ---
But it is ironic that they made that the 'Quiet Coach'.
I'm fairly sure that Coach G was the Quiet Coach to begin with, the theory being that as it was at the end of FC less traffic etc. The two unintentional side effects being everyone tramped into G from SC expecting to find more Standard, and when services were busy it was declassified and now no FC Quiet Coach. So they made H the Quiet Coach instead.