Hi, I arrive BKK at 16:00 from LHR on a TG flight. My onward flight is domestic TG and I have 3 hours between the flights, which are on separate tickets.

I assume I can check luggage through to final destination but clear immigration at BKK. Do I just follow the signs indicating transfer to domestic flights, I seem to recall seeing these before but not taken much notice. . I've been through Suvarnabhumi dozens of times in the past but normally would stay in Bangkok for a while before heading off elsewhere.

A supplementary question, can I take duty free alcohol purchased at LHR through security to the domestic flight. It would still be in a sealed bag, etc.

Thanks for help.