It's certainly been a period of upheaval for the Thai consulates here in the UK.
Both the Hull and Birmingham consulate websites now state that they cannot accept postal applications for visas and that these must be posted directly to the Thai Embassy. The Brum consulate states this change was made on 15th January.
It's been the case for a while now that they had to be sent to London for approval first, but you could still apply by post to the consulate, it basically just took longer. But now it's personal applications only.
For a while Hull seemed to be out of synch with Brum at least, in that from what was said elsewhere, Brum were still issuing stuff, whereas Hull wasn't (recollection might not be 100% me on that one). But maybe that's the reason for the change?
Whatever, if the Embassy don't have the staff to take on board this extra work they have created for themselves, I guess delays of several weeks will be the norm.
Edit:
This is on the Thai Embassy website:
Visa Application by post
The Royal Thai Embassy in London commenced its visa application by post service on the 2 January 2014. Termination of visa services by post at the Royal Thai Consulates in the United Kingdom and Ireland (namely, the Royal Thai Consulates in Birmingham, Cardiff, Hull, Liverpool, Glasgow, Gibralta and Dublin) will be effective from the 15 January 2014.
http://www.thaiembassyuk.org.uk/?q=node/401
2nd edit:
Further to HH Tel's post, I can't see anywhere on Hull's website that states an 'O' visa application can't be processed in Hull, via London, if applying in person. In fact, it states the complete opposite and Birmingham still seem to be saying that's possible!
