Despite being rarer and more difficult to come by, you are more likely to be accepted for a £1,000,000 mortgage if you have saved a substantial deposit to put towards the cost of your new home. The majority of lenders will ask for at least 10% of the purchase price, but usually the more you can put down as your deposit, the better your mortgage terms will be. This is because the Loan to Value (LTV) ratio will be lower, so there is considered less risk to the provider.