Paper share certificates

A friend (seriously) has some old paper share certificates that were bought a long time ago outside of a PEP or ISA etc. They now want to digitize them within a trading account and then bed/ISA those ahres. My understanding is that when digitization from a paper share certificate into an online trading account the amount of shares are depositied at the current share price. For example, 100 shares of company X currently have a price of £2 but were originally bought for 50p. When the paper share certificate is digitized within an online trading account 100 shares at £2 will be recorded. Is capital gains to be considered at this point even though the shares were not sold. Further down the line, those 100 shares now recorded at £2 each are bed/ISA'd where the share price is now £2.50p. Is this the point where capital gain needs to be considered. Also is the gain per share £2.50p - £2 or £2.50p - 50p. Just not sure if the owner of the paper share certificates has a record of the original price for all the paper share certificates.

Hi,
We are unable to answer this question at this time.  
The digitasation of share is still a work in progress, which we have no guidance to refer to beyond the terms of reference at:
Digitisation Taskforce – Terms of Reference.    
We would advise you to continue checking for updates on www.gov.uk.
Thank you.