Capital One offers a guaranteed high interest rate with unlimited access so you can move your money whenever you choose. You can earn 5.50% gross/AER* (var) on your savings now with Capital One's Bonus Saver account, which includes a great bonus of 0.50% in the first year. Apply online now.

Additional Information: Plan Name: Bonus Saver Plan Type: Savings Account Access: Phone, Internet, Post Notice Period: None Minimum Investment: £500 Minimum Investment Period: None Maximum Investment: £1 million Gross Rate: 6.00% AER: 6.00% Interest Period: Monthly or Annually Fixed or Variable: Variable in 1 years

Bonus Saver rates with interest paid annually: Tier Gross rate p.a. AER £ 500 + 6.00% £ 500 (monthly) 5.84%