3rd charge
A lender can place a 3rd charge on your property, but only where you have a mortgage and one other secured loan, or two forms of secured loan, already secured against your property.
As a lender's risk level is much higher with a 3rd charge loan, they are much harder to secure. However, some lenders will still honour this if there is enough security (usually in the form of property) to place the bridging loan against.
Related topics
What is a second charge?
What is a third charge?