If you are non-UK domiciled but tax resident in the UK, you can make a claim that your foreign income and gains are taxed only to the extent they are paid in or remitted to the UK. If you do this, transferring money into the UK from a foreign country may implicate a tax liability.
When transferring funds into the UK, you should consider whether you may be triggering a UK tax liability by remitting foreign income or capital gains. The taxation of remittances is a complex; not limited to straight cash transfers, and there are special rules regarding remittances from a non-UK account which contains a mixture of earned income, investment income and capital gains. You may want to seek tax advice before transferring funds to the UK, especially if the amounts are substantial and/or if they involve translating any other currency into GBP.