 They are similar to cash and S&S ISAs but designed to be used for peer-to-peer lending investments, which were not previously eligible to be held in an ISA.Only platforms with full FCA authorisation (and ISA manager status) are eligible to offer IF ISAs; at launch this barred all major existing platforms because they were awaiting authorisation, leaving just eight at the time relatively minor platforms available and 86 awaiting approval.Equity-based crowdfunding, although similar to peer-to-peer lending, is not included in the eligible products for this type of ISA.