Strikes (Minimum Service Levels) Bill

I tried to intervene on the hon. Member for Crewe and Nantwich (Dr Mullan), who I believe was a GP, and my question would have been: if a doctor, nurse, transport worker or fire and rescue service rescue worker had voted for industrial action and was then instructed by their boss to cross a picket line and was compelled to work, what would that do in terms of the duty of care from the employer to the employee and the wellbeing and mental health of those individuals?