no proof to buy in costs

I have bought some foreign shares many years ago before I move to UK, I don't have proof (such as statements) to proof my buy in cost, how can I report the capital gain tax if I sell them now.

Hi JR 08,

You can contact the company that issued the shares. you can also contact HMRC to do a valuation -
CG16603 - Valuation: post transaction valuation checks: information to be provided and where to send CG34

Thank you.