Thanks it is now sorted. I downloaded the Developer ID - G2 (Expiring 09/17/2031 00:00:00 UTC) and it is now showing as Trusted. Many thanks for your help, very much appreciate it.

I did cert evaluation for the 2 WDRCA certs also (I can provide screenshot if required):- #1 - Developer ID Application with Expiry in 2027 Evaluation Status : No root certificate found. Certificate Status: Good  #2 - WDRCA Expring 20-Feb 2030 Evalution Status : Invalid Extended Key Usage Certificate Status: Invalid Key Usage: Invalid Extended Key Usage App Root CA Expiring 9-Feb 2035 Evaluation Status : Invalid Extended Key Usage Certification Status : Trusted Root #3 - WDRCA Expiring 7-Feb 2023 Evalution Status : Invalid Extended Key Usage Certificate Status: Invalid Extended Key Usage Apple Root CA Expring 9-Feb 2035 Evaluation Status : Invalid Extended Key Usage Certification Status : Trusted Root

It says Evaluation Status : No root certificate found. Certificate Status: Good