i know that they prefere native english speakers in many places.
My girlfriend has little confidence in her english and she should! she is fluent!
she teaches grinds for polish and english in her home towm and yet she tells me that i would have an easier time getting work than her!
which i find hard to believe as i have bad polish :) Though, i wouldnt mind being the 'dummy' in the corner (co-teach :) ) But id rather become more fluent in Polish before i considered it a career.
Regular schools pay peanuts and may not even be able to employ people without Polish teaching qualifications.
Private language schools favour Brits because they don't have any visa problems, unlike other English-speakers.
Teaching is fairly easy as the kids are motivated (they pay!). Schools will have various demands as regards teacher qualifications, but I think that as long as you have some sort of certificate you should get somewhere. I'm out of the game now, and in any case had a PGCE (full UK teaching certificate), which is highly unusual in TEFL circles.