Dividend (rental) payments fall within the £2000 personal allowance for 2020/21.
Any capital gains fall within the £12,300 capital gains allowance for 2020/2021.
Share transfers of £1000 or more are subject to a 0.5% stamp duty fee (Stamp Duty Reserve Tax).
Please note: You will still need to pay tax on any return exceeding these allowances, even when you don't withdraw your funds and decide to reinvest. Any funds you receive in your eWallet are classified as payouts to you, therefore when you do your annual tax return you will have to declare your net payouts. For more information please consult a tax accountant.