Call point covers - Frangible locks?

[Guest Andy]

In some school setting the setting off of the fire alarm can be a frequent occurrence - specifically Special Schools. Typical controls to reduce the incidence of these are covers, however in special schools these can be largely ineffective. Additional measures could be alarmed covers and tamper tags.

More recently I have been asked about covers with frangible locks i.e. the cover is locked but the lock breaks easily should it need to be activated. Are members familier with these and what are your thoughts regards their use i.e do they meet standards.

Thank you 

[AnthonyB]

It's not unheard of in PRU's & similar to have a variation in place to have key operated manual call points and all staff having keys backed up by L1 detection, higher staff ratios, CCTV monitoring and sprinklers to mitigate the call points being changed.