Undue influence leads to an invalid will (boyesturner.com)
A high bar for establishing undue influence in relation to wills – Macfarlanes
www.footanstey.com/our-insights/articles-news/under-pressure-undue-influence-in-will-drafting/
See also:
www.brabners.com/blogs/determining-undue-influence-rea-v-rea-court-appeal