Most lenders will let you borrow 3.5 times your annual salary so, as long as you have a standard 10% deposit, you should be able to borrow this much.
Depending on your personal circumstances, some lenders may let you borrow 4 – 4.5 times your salary.
Lenders usually cap the amount they lend at 5 times your salary, so it’s unlikely you’ll be able to borrow more than this.