ETASSUM24520 | Schedule 2 share incentive plan (SIP): Types of award: Matching shares: General requirements
From HM Revenue & Customs · Employee Tax Advantaged Share Scheme User Manual
Matching shares must be:
shares of the same class and carrying the same rights as the partnership shares they match,
awarded on the same day as the partnership shares they match, and
awarded to all those who take part in the award on exactly the same basis (paragraph 59(1)).