What makes a will invalid in the UK?

A will can be invalid in the UK if it does not meet legal formalities, such as lacking the testator’s signature or proper witnessing by two independent witnesses. It may also be invalid if the testator lacked the mental capacity to make a will, was under undue influence or fraud, or if the will is unclear or ambiguous. Additionally, if there is a more recent valid will, an older will may be superseded. To avoid invalidation, it is important to ensure the will is correctly drafted, signed, witnessed, and reflects the testator’s clear intentions.