On 8 September 2026, Guillaume Grisel participated as a panelist in a panel discussion in Geneva, organised by Highvern and PCD, for a select audience of lawyers, bankers and trustees. The discussion focused on Swiss–UK private client issues, including the immigration of ultra-high-net-worth individuals (UHNWIs) from the UK to Switzerland and estate planning considerations for UHNWIs who have relocated from the UK to Switzerland. The panel also featured Richard Joynt (Highvern, Jersey), Vincent Roduit (Leovest, Switzerland) and Claire Randall (Farrer & Co, UK), and was moderated by David Bell (PCD, UK).