If you have poor credit, some lenders will automatically reject your application. Others will be more willing to consider you if you can show more recent evidence of good credit behaviour. For example, you might have a satisfied CCJ
from 5 years ago impacting your credit score. This won’t be an issue for all lenders.
If your credit problems are not recent and you can make up for it with a higher deposit or regular monthly earnings, many lenders will be more than happy to accept you.