Wills are framed as 'older person' concern. The reality: any adult with property (owned or co-owned), unmarried partner, children, or strong preferences about asset distribution needs one. Dying intestate distributes by formula that often doesn't match what you'd want.
Cost and time
£100-300 for online will service (Farewill, Co-op Legal). 1-2 hours of decision-making. Update every 5 years or after major life events.
If you have any complex situation (cohabiting partner, step-children, business ownership, specific bequests to friends or charities), the will is essential. The 'I'm too young to bother' framing is wrong for most adults over 25.