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HMRC internal manual

Capital Gains Manual

Groups: indexation allowance restriction: not redeemable preference shares

If the shares disposed of form only part of a larger holding, and not all the shares were acquired in circumstances meeting the conditions for a restriction of indexation allowance, the indexation allowance available on the disposal is restricted by an amount which is just and reasonable. CG46221 sets out a suggested method, but you should consider on its merits any alternative apportionment proposed by the company.