What is the cost-basis used to calculate the capital gains tax payable to the UK for someone who has acquired those shares before they took up UK residence?
Some assumptions about the question:
I have never been resident in the UK and am taking up residence in the current year on 1st of April.
I have acquired public shares in different UK and non-UK companies.
Some shares have an unrealized gain and some have an unrealized loss based on the acquisition price.
If i dispose of the shares with gains in the year of taking up residence, or in the subsequent years, would the price used to calculate the CGT payable be the price at which the shares were acquired (while non-resident) or the price at which the shares were on the day of taking up UK residence?