When you go to transfer your money, you'll see a list of your eligible bank accounts or debit cards. As this list is ever expanding when banks decide to allow this feature, be sure to add your funding source to the account and check periodically if you don't show it available. 

Instant Transfer withdrawal limit for debit cards:

• Minimum  withdrawal amount: 1.00 GBP
• Maximum  withdrawal amount per  transaction: 1,500.00 GBP
• Maximum  withdrawal amount per  day: 7,500.00 GBP
• Maximum  withdrawal amount per  week: 7,500.00 GBP
• Maximum  withdrawal amount per  month: 7,500.00 GBP