To improve your bad credit rating, there are a few things you can do to possibly increase your chances of being approved for a bad credit mortgage:
Check that you are on the electoral roll
Always pay your bills on time and in full
Close any credit accounts you have for stores or catalogues and no longer use
Consider applying for a credit builder credit card, to help show lenders that you can manage money responsibly
Guarantor loans can also improve your credit score, if you keep on top of your repayments
Regularly check your credit report to make sure that all the information is correct. If any of the details are incorrect, contact the relevant lender and ask for these to be amended.
Making these changes should help improve your credit score, but it will not happen overnight, especially if you have a history of bad credit or have missed multiple payments.