I've been planning to commute from Paddington to Oxford on weekdays, 7.20 to Oxford in the morning, 16.32 to paddington in the evening. Usually over the last year, whenever I check on gwr, the tickets for these times have been £4.30 as long as I've checked at least 3 weeks or more in advance. I was able to do this for the month of September (booked near start of august) and for October (booked in start of September) Now I'm trying to buy tickets for November, but all the prices for the advance singles seem to have a higher baseline? Anyone know why, or was I just too slow and am I just out of luck now?