Fire door lock

[Pt200]

Hi, 

what are the regulations (if any) regarding fire door locks/cylinder.

My landlord changed the locks on my door from a good Kite mark 3* fire rated cylinder to one that is not fire safe and not BS approved either/no kite mark logo ( even online the specs do not list as fire safe or BS approved) 

I have been trying to tell them they need to replace it like for like as this will likely go against me with my insurance but they are ignoring me

 

thanks 

[Ronan]

I would be interested in knowing more about this as well.