what might invalidate a correctly made will?Do any alterations to a will eg.witnesses or executors or beneficiaries dying cause extra expense or can this be done without incurring cost?
If a will is correctly made (ie with the intention to make a Will, with testamentary capacity and with compliance with s9 Wills Act 1987) nothing invalidates its. It can only be REVOKED by another testamentary instrument, by destruction with the intention to revoke or by marriage.