You can get a mortgage as a first-time buyer if you have had bad credit in the past. The type of rate and who the lender will be, completely depends on several factors like:
1. How much deposit you need. You generally need at least 10% deposit, but in most cases, you need 15%
2. What type of bad credit you have, for example, do you have defaults, CCJs, Bankruptcy, IVA or a Debt Management Plan?
3. When were the bad debts registered and how much were they?
These mortgages are available to First time buyers buying their first home but in short you need a larger deposit and you will pay a higher interest rate than normal.
The amount of interest and the deposit you need depends on how recent and the level of bad credit you have.