Legality of course and then work?

There will definately be a break in the middle - workplace courses of 4 hours have a short toilet break in the middle of it - it is a requirement to keep the attention of the participants. Your friend is over worrying. There are no LAWS as such in place - the government doesnt regulate every aspect of workplace life. I really think your friend is just whinging and over thinking the situation - ask her next week and you will find there were breaks.