1. Royal Thai Embassy, London, U.K.
2. Yes, residing in the U.K.
3. Yes, flying London-Bangkok (via Abu Dhabi).
So as suggested previously, I will simply upload the biodata page of my passport, and if there are any issues with this part of the application I'll be back here to let you all know.
One thing I think we can all agree on is that this whole process could certainly be smoother. But hey, that's Thai bureaucracy for you.
Thanks to all.