I can't remember when the last round of increases took effect, but it dosn't seem that long ago.
As of 30th June, new fees will be applicable. Increases are to take account of inflation. The full lists are on their website. Here's the link to the consular ones:
http://www.britishembassy.gov.uk/servle ... 3953328230
Interesting to see that they're valuing the Baht at 70 to GBP.