ne even got asked to see their degree, had a CRB and so on.
I have had to show my degree many times, in private language schools in England. CRB is only necessary if you are asked to work with people under 16 (or vulnerable adults)(I think), and so I was asked for it only once, when engaged to work for an agency teaching ESOL in FE colleges. Private language schools have never asked for a CRB, as they are usually for 16 plus. I think if you were engaged on a summer school for teenagers, you are more and more likely to be asked for this. Although the reality is you are asked to sign a piece of paper saying you have no objections to being checked. (Have signed this few times) THen the schools don't check anyway as the process is very expensive. Quite honestly the whole thing is a farce.
As for teaching in Poland, when I was there, there were one or two right pervy types in town, lets just say I definitely wouldn't want them teaching my daughter..(or son) At that time people were teaching English without a degree or qualifications at all, let alone any police check. I daresay the situation has changed, and rightly so.