Actually some people don't...
...but for most people in the UK, having one in place is strongly recommended to ensure their wishes are clearly followed after death. If you are asking this question, there is a good chance you already recognise the importance of putting plans in place.
In reality, the key question is not simply “Do I need a Will?” but rather “What type of Will is right for my circumstances?”
The answer depends on your personal situation, including your family structure, the value and type of your assets, and what you want to happen to your estate in the future. Without a valid Will, your estate will be distributed under UK intestacy rules, which may not reflect your wishes.
Understanding your options helps ensure your estate is protected, your loved ones are provided for, and your intentions are legally secured.