Thanks for the comments - some differences of opinion.
In respect of Article 22, the need for evacuation aids etc would come as a result of a PEEPs, which in turn should have been identified as part of a risk assessment. If landlord, as part of the his risk assessment relating to the areas under his control, did not employ any persons especially at risk, and was not open to the public, he could conclude that he would not require any additional measures for them. So therefore, any MIP's would be introduced as a result of the tennants. I would assume that it would be up to the tennant, under Article 22, to inform the Landlord of any indentified MOE issues -if none of the RP's informed the landlord that there were MIP's in their premises, and no evac chairs etc were provided in common areas, would the Landlord have failed in his duties if he wasn't informed?