Questions 9.13, 9.14 and 9.15 ask about finger prints. My wife has no idea when her prints were taken but I guess it was during the settlement visa application in 2012. I take it the the answer to 9.14 where were they taken was VFS????? in Ratchadamri and the Britich diplomatic post involved was the British Embassy.

Can I just put 2012 or are they expecting the actual date?

Q9.13: Her fingerprints and other biometrics would have been taken when she submitted her visa application at the UKVAC (VFS).

If neither you nor your wife can remember the exact date she submitted the application, put as much as you can; month and year or even just year, with a note to say you can't remember the exact date.

Q9.14; UK Visa Application Centre, Bangkok, Thailand.

Q9.15: British Embassy, Bangkok, Thailand.

Thanks. I will see if the wife can remember when she went to get her finger prints taken but given the importance Thais put on this sort of thing I am not holding out much hope.