"Size doesn't matter ..."
| GUC, London AA, south | Stretch code | All-time max. | 2022 max. | 2021 max. | 2020 max. | 2019 max. | Veggie max. | Retro max. | |
| Nash Mills, Red Lion Lane to rail bridge | NashMi | 17.9gWiNe 2018-04-12 | - | 10.0g | 13.5g | - | - | 13.5g | - |
| Kings Langley, rail bridge to Water Lane | KLaNor | 16.0gShEr 2020-09-03 | - | 15.2g | 16.0g | - | - | 16.0g | - |
| Kings Langley, Water Lane to Home Park lock | KLaOva | 16.3gShEr 2020-12-29 | - | - | 16.3g | - | - | 16.3g | - |
| Kings Langley, Home Park lock to M25 | KLaHPM | 23.8gWiNe 2012-02-19 | - | - | 11.5g | - | - | - | - |
| Hunton Bridge, M25 to lock | HuBM25 | 22.1gWaGi 2013-08-18 | - | - | - | - | - | - | - |
| Hunton Bridge, lock south to Bridge Road | HuBNor | 25.4gBeTo 2014-02-16 | - | - | - | 8.0g | - | 12.6g | - |