Will my credit score suffer because I don't have a mortgage?

Lenders want to know if you can reliably keep up to date with monthly repayments, and so showing that you can repay a mortgage may boost your credit score. On the other hand, showing that you can manage credit accounts (for example a loan or a credit card), could also help you to boost your credit score.

Your credit score is only one of the factors that will be considered during any credit assessment.