It's a good idea to keep your Will up-to-date, especially if there has been a significant change in your personal circumstances like the ending of a relationship. People may also forget about funds where a beneficiary can be nominated, such as a pension.
While an application to the court under the Inheritance (Provision for Family and Dependants) Act 1975 may be possible, it's not quick and it's not cheap. Just remember Illot v Mitson in the Supreme Court last year, or Jarndyce v Jarndyce where the only winners were the lawyers...
This case highlights the vital importance of reviewing your will periodically and after a significant change in circumstances to ensure that the terms reflect your current wishes. It also demonstrates the court’s preference to award a life interest in property rather than a capital sum where provision is limited to maintenance.
https://www.familylaw.co.uk/news_and_comment/the-perils-of-an-outdated-will#.WnMsG1Vl-Uk
