please let me know that if i could apply in u.k. for a teaching positions and then get an ESL certification afterwards ?
Welcome to the forum! Teachers interested in working in the UK must be licensed to teach in their state/province. Please note that teachers who have an undergraduate degree but no teaching credentials will not be considered for teaching jobs in the UK. All applicants will be required to provide a criminal background check in order to teach in the UK.
In order to live and work in the UK, all teachers must have a valid work visa. The most common visa for teachers applying from Canada, Australia, and New Zealand is the Youth Mobility Visa (Tier 5).
The time it takes to process your visa will depend upon a number of factors, so teachers are encouraged to apply as soon as possible. Please visit http://www.ukba.homeoffice.gov.uk/workingintheuk/tier5/youthmobilityscheme for more information on the visa.
Hope this helps!