Capital gains on foreign employee shares

I am a UK resident who was awarded several batches on shares by my employer in the USA. For a long time I reinvested them after deduction of withholding tax and paid UK tax on the value. What is my position on UK Capital Gains tax? The shares were one off rather than given in a formlal awards scheme

Hi,

You can see guidance here:

Tax and Employee Share Schemes

Thank you.

Hi,

As a UK resident, you would be subject to UK rules on capital gains on the disposal of the shares.  
You would be required to report the disposal in a Self Assessment tax return, where a gain arises, in the capital gains section, which on paper, is SA108. 

Self Assessment tax return forms

If tax is withheld in the USA, you would need to review the UK/USA tax treaty, regarding capital gains taxation. If you have to pay tax in the USA, you can claim up to 100% of the foreign tax in the foreign section of the tax return (on paper SA106).

Thank you.