The words unsecured and low rate wont usually be used to describe the same loan. Usually in giving an unsecured loan a lender is taking a greater risk with you and will therefore charge more interest. This may be about 2-6% more per annum than a secured loan for the same value.
Unsecured loans for people with poor credit will definitely have bd interest rates as someone with bad credit and low security you would pose a risk for the bank.
Unsecured loans, especially for people with poor credit are likely to be lower in value in the area of a few hundred pounds. This is another way that the banks can limit their risk, by lending only small amounts at this risk level. If you need a bigger loan amount or a less interest rate it will be beneficial to shop around.
I may need a no credit check loan someday, it can be useful to do the research now to find the best rates. It would be of your benefit to ask a finance advisor.
