My answer: "10/03/2004 (best guess)"D3. What date was the entry clearance or visa issued?
My answer : "UNKNOWN (SEE C7)"D4. Please enter the reference number on the entry clearance or visa which can be found in the applicant’s passport or travel document.
This refers to an included Home Office letter acknowledging the passport had been lost. I presume they want the original entry visa reference and not the current one listed in my current passport which was issued within the UK?
My answer: "10/03/2004 (best guess)"D10. When did the applicant arrive in the United Kingdom?
I also put "not known" under ticket booking reference.
Also, one other question: I didn't report the passport stolen, as it was lost in the post not stolen as far as I know. Is it advisable to now report it to the police for application purposes?
Thanks very much for reading, and advising if you can!