By switching part of your mortgage to repayment, the increase in your monthly payments will be less than with a full switch, so this option could be more affordable. If your rental income increases in the future, you can also increase the portion of your mortgage on repayment, and 'step up' your monthly payments. This will in turn increase the amount of your loan that you'll be gradually paying off.
With a Part and Part mortgage, whilst you won't pay off your entire loan over the term of your mortgage, you will reduce the balance you owe. This could help if you are facing a shortfall from an investment plan, or if you eventually sell your property in the future for less than you expect.
Alternatively, if you are thinking of remortgaging with another lender, reducing your balance should increase the equity in your property and potentially give you more remortgage options.
Please contact us to discuss how Part and Part may work for you. We can then provide you with details of how much extra you would have to pay each month.