National Grid Elect Trans – XS2200513153
These bonds are deemed a ‘security’ for ISA qualification purposes. To qualify for ISA inclusion, either the security or the shares in the issuing company need to be listed on a recognised stock exchange or admitted to trading on a recognised stock exchange in the European Economic Area (EEA) or the UK (see ISA Guidance https://www.gov.uk/guidance/stocks-and-shares-investments-for-isa-managers#compsecur ). In this case, the security is traded on a recognised stock exchange so on that basis, the security should qualify for stocks & shares ISA inclusion.
See link below for bond.