| Grade Improvement | Name | Club | Grade | Previous Grade |
|---|---|---|---|---|
| 321 | Clive Rothery | Cornwall CCA | 1913 | 1592 |
| 321 | Clive Rothery | Newquay | 1913 | 1592 |
| 320 | Zack Norris | Gloucestershire* | 2004 | 1684 |
| 265 | Philip Tarrant-Edwards | Hampshire * | 1782 | 1517 |
| 228 | Pengxiao Zhu | Devon * | 2055 | 1827 |
| 217 | Adri Van Hensbergen | Somerset * | 1789 | 1572 |
| 148 | Jamie J Doyle | Hampshire * | 1959 | 1811 |
| 130 | Caleb Caleshu | Devon * | 2097 | 1967 |
| 126 | Lloyd Russell | Cornwall CCA | 1409 | 1283 |
| 126 | Lloyd Russell | Bude | 1409 | 1283 |
| 122 | Rami Talab | Cornwall CCA | 2265 | 2143 |
| 122 | Rami Talab | Carrick | 2265 | 2143 |
| 108 | Alex Carey | Gloucestershire* | 1978 | 1870 |
| 106 | Aaron Hands | Liskeard | 1614 | 1508 |
| 103 | Tim Jelfs | Gloucestershire* | 1790 | 1687 |
| 98 | Ajna Fern | Lerryn | 1639 | 1541 |
| 98 | Ajna Fern | Cornwall CCA | 1639 | 1541 |
| 92 | Robert M Ashworth | Gloucestershire* | 1948 | 1856 |
| 86 | Bruno Alexandre Dos Santos Silva | Somerset * | 1840 | 1754 |
| 77 | Alexandru-Mitic Moldovan | Gloucestershire* | 1898 | 1821 |