Baby arriving next week. I'm told that to make baby British, he/she has to be registered at the Embassy.

This is what the UK Embassy website mentions - are they referring to the same issue?

ps Is there any time limit - do I have to do it quick-quick?

Consular Birth Registration

*Birth outside of Thailand will need to be forwarded to the relevant Post for registering.

Birth registration is not compulsory, but we recommend it. The advantages are that

(1) A British style birth certificate is available as proof of identity and proof of nationality.

(2) A record of the birth will afterwards be held at the General Register Office in the United Kingdom. In the future, copies can be obtained from the General Register Office.

The fee for registration plus one certified copy of the entry is Baht 9,488 Additional copies of the entry can be obtained at a cost of Baht 2,625 per certificate.

Before processing an application to register a child's birth, we need to see evidence of the child's nationality status. Original documents are required (all documents will be returned to you when the application has been processed, parents passports will be returned day of application). Photocopies are not accepted in any circumstances. We require certified translations (ie official translations from a translation bureau) of any document(s) not in English.

I'm in the same position as you (may see you there next week! ) and I assume that the registration details listed on the embassy website are the same as the Registration for nationality. Hopefully someone else will tell us if we're wrong!

You may also want to apply for a passport at the same time. Forms are here. I've not yet worked out the best way to get the photos for the passport though...