To contest a UK will, you must act quickly to seek specialist solicitor advice and enter a ‘caveat’ at the Probate Registry, temporarily stopping the probate process. You typically have 6 months of the Grant of Probate being issued to gather evidence to support your case that the will is invalid.
A wills and probate solicitor can guide you through the complex process, sourcing evidence to prove one or more of the following grounds: lack of testamentary capacity, duress or influence, improper execution, forgery or fraud, or lack of knowledge and approval.