Under the same name and email address, you can open an Invest, CFD, and ISA (if you're a resident of the UK).
You can easily switch between them by pressing on the three lines above each other and selecting your desired account 👇
If you have only one type of account and select another through the menu, you can start the process of opening that account.
🖥️ Through the web app, you can do so by clicking on your account balance in the top left corner and selecting your desired account from the pop-up screen.