I had a long term contract teaching English as a Foreign Language for 2 hours a week in a school for most of last year. At the end of the academic year the agency told me the school wanted me to continue and I was sent an email, stating the hours and pay (£30 per hour) for this year. The school then asked if I would be prepared to carry out the tuition on line, which I agreed to. I was due to start tomorrow and had already prepared the first lesson, when I received a phone call from the agency, saying the pay would only be £20-25 per hour as 'you don't have to travel'. I have told them I can't continue unless I get the previously agreed rate. Is this the shape of things to come? Would it be worth getting union advice? Frankly, for the extra work and stress of teaching on line it simply isn't worth it, even though I've got no other work at the moment.