Let's say Bob is a resident and tax domiciled somewhere outside the UK, e.g. Singapore.
Bob opened a stock brokerage account with a European broker, and the account is funded through a UK-based personal bank account.
Bob makes gains on his investments, quadrupling the value of his portfolio. He then liquidates the portfolio and withdraws all the money back into his UK account.
Bob now wants to remit all that money to his domestic bank account.
What tax liability does bob incur, if at all?
Im not concerned with Singapore tax liability, but any liability charged by the UK when attempting to transfer his profits to Singapore.
Bob resides in Singapore throughout this entire time, and is tax domiciled is Singapore. Both his UK Bank and his Broker knows this