This is all a bit meaningless without knowing the proportion of Advance : Semi flex tickets made available.
If there were a ratio of one Advance to every nine Semi Flex tickets then of all the non-anytime tickets available:
- 6.6% would be guaranteed to be less than 50% of the anytime price
- 2.4% would be guaranteed to be less than 80% of the anytime price
- 91% of tickets could be anything up to the full anytime price.
(if I've got my sums right)
Furthermore, it doesn't say anything about how they can be distributed across services. So if you want to travel on a particular train there's no guarantee of anything being available at all, even booked long in advance and even if it would currently be considered an "off-peak" service.
Hmm. I read that as that the semi-flexes being included in the totals when they say "fixed". I realise that's not what they say, but since semi-flexes seem to be charged as an advance plus a premium for the generous flexibility I suspect that's what they mean.
But never mind how they are distributed across services or how close to the travel date they're available - there is no committment to what percentage of seats will be available as advance tickets.
They could restrict advance sales to one train a week and still meet their "assurances".
They could also effectively become an all "advance" railway by putting the anytime fares up to £5000 in the next fares round - I don't think anything in principle prevents them from doing that.
Of course for commercial reasons they're unlikely do either of these and if they are selling advances they will then have some constraints thanks to these rules.
But they don't appear to have been set up in a very robust manner and they look as if they're designed to look as if they provide much more than they actually do.
Of course committment 1 isn't a committment at all - just a statement of fact.