Hi, Thank you for your question and welcome. Is this the only way they will verify your identity? Would they accept a solicitor verifying it for you as well?
Apparently not, so I have to find a way to get confirmation that they were my passports.
Is there any official entity who can certify that the passports actually belonged to me?
Possibly making it more difficult the passports would have been issued while I lived in Thailand, Japan, Singapore or Hong Kong - possibly even Malaysia. I assume some UK authority would have to have the information for security reasons, but the passports in question were current in the mid-seventies and 1992.
I look forward to hearing from you.