No. You can only open an IBUKL Junior Stocks and Shares ISA under a GBP cash account type. A cash account requires that all transactions are made with available cash or long positions.
Additional Information
Can I trade on margin under the IBUKL Junior Stocks and Shares ISA?
Powered by IBot
Under what IBUKL account type can I open my IBUKL Stocks and Shares ISA?
Can I cancel my IBUKL Junior Stocks and Shares ISA?
Can I trade on margin under the IBUKL Stocks and Shares ISA?
What is the annual fee for the IBUKL Junior Stocks and Shares ISA?