my sister has worked for the same firm for 25 years and was transferred to another office 4 years ago. she settled in fine and ajusted her life around the move. she has now had a grievance with her line manager and is getting transferred to her original office "a busines decision" apparantly 
she is distraugt and has had to take time off with stress to work out what to do. the move means she will have to travel 4 hours on buses per day in order to do 3 hours work she only travels 1 and half hours now. she will have to resign if she is forced to move. she has 2 children who she has to fit her hours of work around. can she refuse to move or will she just have to resign? any advice would be appreciated as i just dont know how to guide her.