I can't find E & W premium, post-promotion purchase renewals, but I'm confident in the rest (well, as confident as I can be given that multiple people on Facebook can't accurately recall what they paid 12 months ago!) Adult prices below, haven't the time or motivation to do the rest and you've done the leg work already.
To one of your earlier points, it seems that some people who have moved seats, aren't being given the correct discounts for continuity of service.
| | Corners, N and S | E and W | E and W Premium |
| 2024-25 | Early bird | 420 | 535 | 565 |
| Renewal | 440 | 565 | 590 |
| New purchase | 460 | 580 | 620 |
| | | | |
| 2025-26 | Early bird renewal | 460 | 580 | 620 |
| Pre April cut off | 490 | 610 | 680 |
| Post-promotion | 590 | 690 | 780 |
| | | | |
| 2026-27 | Since 2022 | 550 | 660 | 750 |
| Since 2023 or after | 570 | 690 | 815 |
| Post-promotion | 615 | 715 | ? |