I am asking for a friend. She recently took 2 weeks annual leave, which had been booked months in advance. Just before she went on leave, her employer told her she would have to be available to take calls the entire time she was away on leave. She objected, but they insisted. She told them she didn't think there would be a signal, but they said they had checked, and that there would be a signal which for the phone they provided.
So basically, for the whole 2 weeks, she wasn't able to drink, had to keep her phone with her the whole time, and couldn't relax.
I think this may be in breach of the Working Time Directive, but I haven't been able to find a reference. Can anyone else advise?