Calculating capital gains on shares with reinvested dividends

If I have shares from the same company (in a Section 104 holding), that have been built up over many years, including reinvested dividends, how should the purchase price of the shares be calculated? Should it include the value of the reinvested dividends? Many thanks.

Hi,

Please refer to guidance at:

Shares and Capital Gains Tax (Self Assessment helpsheet HS284)

Thank you.