One of the conditions for the reliefs is that the Name must give notice of resignation. Under Lloyd's rules, a Name may withdraw that notice of resignation, and in theory that withdrawal could be outside normal assessment time limits, in which case HMRC would be unable to withdraw any relief which had been claimed under Schedule 20A.
FA93/SCH20A/PARA9 requires the Name to give written notice of the withdrawal, within six months. Any relief claimed can be withdrawn, regardless of normal time limits for assessing. If a member fraudulently or negligently fails to comply with this requirement, the incorrect return provisions of TMA70/S95 will apply.