This advice has been reviewed and reissued with an amendment to the Summary,

Security and Local Travel section (to reflect post-curfew amendments). The overall level

of the advice has changed; we no longer advise against travel to Bangkok and Chiang Mai. 

We currently advise British nationals in Thailand to exercise caution.

Travel Summary

• We advise against all travel to the Preah Vihear (Khaoi Pra Viharn in Thai) temple area, due to violence in the area. See the Local Travel section of this travel advice.
  
• We advise against all but essential travel to, or through, the far southern provinces of Pattani, Yala, Narathiwat and Songkhla, due to the insurgency in these areas.  
• Elsewhere in Thailand, the situation is generally calm following recent political and civil unrest.  There have been no serious incidents of violence since 21 May. However there remains a risk that political developments may lead to further violence.  You should follow news reports and be alert to any developments which might trigger public protests or unrest.
• More details here