Does the same will-writing process apply everywhere in the UK?
No. England and Wales form one wills jurisdiction, Scotland has a separate succession-law system, and Northern Ireland has its own legislation. Differences affect minimum age, signing, witnessing and protected family entitlements. A template designed for one system should not automatically be used in another, particularly where the testator owns property in several jurisdictions.
England and Wales
For the usual adult will, a testator must have the requisite capacity and act voluntarily. A will must be in writing and signed or acknowledged with the formalities required by section 9 of the Wills Act 1837. In ordinary cases, two witnesses must be present together when the testator signs or acknowledges the signature, and each witness must attest or acknowledge their own signature in the testator’s presence. The circumstances of any person signing at the testator’s direction require careful handling.
Scotland
A person aged 12 or over may make a will if they have the necessary understanding and capacity. Scots law requires written and properly signed testamentary documents; particular witnessing formalities can make a document probative (self-proving). Scotland also protects certain legal-rights entitlements of spouses, civil partners and children in moveable estate. These rules require distinct Scottish drafting and cannot simply be overlaid onto an English will.
Northern Ireland
The Wills and Administration Proceedings (Northern Ireland) Order 1994 contains its own provisions on testamentary age and execution. As a general rule, the minimum age is 18, with a statutory exception for certain people who are or have been married or civil partners. Article 5 sets out writing, signature and two-witness requirements. The exception and special circumstances need individual analysis rather than automated assumptions.
What about property abroad?
Where there is overseas real property, habitual residence abroad, more than one nationality or an existing foreign will, the applicable law can be a conflict-of-laws question. A home address entered into a questionnaire is not, by itself, a complete answer. Specialist cross-border review may be required, especially before drafting revocation provisions or multiple wills.
Where do I check the current rules?
GOV.UK — Validity in England and Wales · Wills Act 1837, section 9 · mygov.scot — Create a will · Northern Ireland Order 1994, Part II.