ETASSUM44370 | Schedule 4 Company Share Option Plan (CSOP): Requirements relating to options: For illness
From HM Revenue & Customs · Employee Tax Advantaged Share Scheme User Manual
Illness is not one of the ‘good leaver’ terms mentioned in section 524(2B) ITEPA, but it is commonly referred to in scheme rules as a trigger for exercise. Ancillary documents that form part of the scheme should make clear that tax relief is not available in these particular circumstances if exercise takes place within 3 years of the date of grant.