Anyone tried this TEFL course? Watch
They are the best ones for the UK. Highly recommend you do the classroom based versus the online though. There are different levels as well.
TEFL = Teaching English Foreign Language
TESOL = Teaching English Speakers Other Languages
ESL = English Second Language
CELTA and DELTA are the big ones. They are highly sought after in the TEFL world and would probably guarantee you a position anywhere that is looking for EFL teachers.
TEFL, TESOL will equip you with the basic skills to teach English and to run a classroom and setup lesson plans, etc. With a bit of extra brain power you can go a long way with those. Don't expect a high level position in the beginning though. And if you want, this can be made into a very rewarding career.