Calculating capital gains after moving shares to different account

Hi, I'd like to understnad how to calculate the gain (or loss) from some shares I purchased abroad, but moved (via the same brooker) to the UK. I bought the shares in one country (in EUR), requested the brooker to move them to a UK account (I did not sell them and repurchase), and now I intend to sell them in GBP, but am wondering how to account for gains and losses due to the transfer. During all this time I was a UK tax resident, registered as such in the brooker platform on both countries. Would it be a matter of identifying the purchase price (in EUR), convert it to GBP (with a monthly or even daily historic rate, e.g. https://www.trade-tariff.service.gov.uk/exchange_rates/monthly ) , sell the shares I intent to sell now (would receive GBP), and assess the difference? Does the transfer in the middle affect this in any way? Thanks in advance for any pointers!

Hi fg,
You would convert the acquisition costs to pounds sterling, using a just and reasonable exchange rate at the time of acquistion. 
(Capital Gains Manual CG15250 - Expenditure: incidental costs of acquisition and disposal)
This would be deducted from the disposal value, as well as disposal costs, to declare the gain.  
The transfer in the middle does not affect the calculation in any way.
Thank you.