I've uploaded the latest UK postcode data to my website. Some people have been asking about the ward boundary changes. These are included in the update but are not complete so I would approach with caution. I made some manual changes so that all postcodes have a ward associated but these will be the old wards in some cases.
From the ONSPD user guide
This release of the NHSPD includes the 2022 ward boundary changes. However, some change orders have yet to be included in OS Boundary-Line including The Cumbria (Structural Changes) Order 2022, The North Yorkshire (Structural Changes) Order 2022 and The Somerset (Structural Changes) Order 2022. Therefore, ward codes E05014171–E05014393 are not yet included. Also, Welsh wards W05001616 –W05001626 in Merthyr Tydfil are yet to be included and Sirhowy ward in Blaenau Gwent should be W05001268 rather than W05000764. In Scotland there is a duplicated ward code – S13003134. This should be S13003134 – Stepps, Chryston and Muirhead in North Lanarkshire and S13002608 – An Taobh Siar agus Nis in Na h-Eileanan Siar