If push comes to shove, can an employee legally refuse to carry out specific duties in an emergency as detailed in the Employer's emergency plan?
Article 23. —(1) Every employee must, while at work—
(b) as regards any duty or requirement imposed on his employer by or under any provision of this Order, co-operate with him so far as is necessary to enable that duty or requirement to be performed or complied with;
These duties on the employer are imposed thrrough article 15
Article 15. —(1) The responsible person must—
(a) establish and, where necessary, give effect to appropriate procedures, including safety drills, to be followed in the event of serious and imminent danger to relevant persons;
(b) nominate a sufficient number of competent persons to implement those procedures in so far as they relate to the evacuation of relevant persons from the premises;
And article 18
18. —(1) The responsible person must, subject to paragraphs (6) and (7), appoint one or more competent persons to assist him in undertaking the preventive and protective measures.
The meaning of "Protective and preventive measures" and "general fire precautions " are
defined in articles 2 and 4.
From this I would suggest that it is appropriate for an employer to give reasonable instructions to an employee in respect of their actions in case of fire and that these may include the normal duties attributed to by the role of a "Fire Warden" - ie initiating an evacuation, helping to ensure the premises are fully evacuated in a timely manner, assisting persons with special needs and the use of fire fighting equipment, all of course subject to training and ability.