I took a look at the people standing down (highlighted red), and who the parties/groups had put up as their replacement candidate for that seat.
I wonder what the reasons behind those no longer wishing to stand are? Feels like quite a large lib dem turnover this year.
Disclaimer: Feel free to fact-check me, I could have made errors. 
| Ward | Current Seat | Cllr Term Ending | Replacement | Previous Terms |
|---|---|---|---|---|
| Hamble and Netley | Lib Dem | David Airey | Liz Jarvis | Active newcomer |
| Hedge End South | Lib Dem | Margaret Allingham | Jane Welsh | 1991-2016 |
| West End South | Lib Dem | Janice Asman | re-election | 2016-2022 |
| Eastleigh South | Lib Dem | Paul Bicknell | re-election | 2011-2022 |
| Chandlers Ford | Lib Dem | Alan Broadhurst | re-election | 1999-2022 |
| Eastleigh Central | Independent | Tina Campbell | re-election | 2017-2022 |
| Eastleigh North | Lib Dem | Daniel Clarke | Stephen Beer | Silent Newcomer |
| Bursledon and Hound North | Lib Dem | Tonia Craig | re-election | 2002-2022 |
| Hiltingbury | Conservative | Judith Grajewski | Margaret Atkinson | 2014-2021 |
| Hedge End North | Lib Dem | Lucy Jurd | Leigh Hadaway | Silent Newcomer |
| Botley | Lib Dem | Rupert Kryle | re-election | 2002-2022 |
| Bishopstoke | Independent | Louise Parker-Jones | re-election | 2018-2022 |
| Fair Oak & Horton Heath | Lib Dem | Rob Rushton | Nicholas Couldrey | 2016-2021 |
| West End North | Lib Dem | Bruce Tennant | re-election | 2006-2022 |