Shares On Redundancy

Hi,

Upon redundancy and subsequent retirement my father was offered a cash or shares option and he opted for the share option. I believe during his employment with the same company he also received shares through a share incentive plan. Because he was made redundant he didn't have to pay tax and NI on either the shares he received during his employment or the shares given as part of the redundancy package. The shares are held through TD investing (the platform his employer chose to use), now I read that if the shares remain in a share incentive plan there is no capital gains tax to pay. Does this also apply to shares that were awarded to him as part of a redundancy package and is he required to pay CGT on selling these?

Thanks for your help