Might be coincidence but the fare rule I have relied on to get several of the Dub-X-X-PSP/TUS returns this year - INX1C1S4- seems to be unavailable for the rest of this year and only D class - DNX1C1S4
- is available. This means £700 extra on the dates I looked at.
The I class fares return in Jan 2025 and prices return to around £1200 in Jan - especially returning to Spain. Example: