I have been working in the industry for several years maintaining automatic gates, access control, CCTV and intruder. I  have currently undergone SSAIB certification though, and it seems there is still a lot for me to learn as I move into doing more complex alarms and police response. Be prepared for lots of questions......first one.... I noticed 2 internal sounders side by side in an office on a grade three police response alarm, is there a specific reason for this? I looked in the regs but can't really find anything.

Hello and welcome

I'd go with the notification option re 2 sabs but could be remotely powered or no internal 

Yeah, I think they have just gone belts and braces with the external sab, 2 internal sounders, better to be safe than sorry, it just threw me a bit.....I think they may even be an scb on the back too.