Thanks
I'll triple check all of these tomorrow, I've only done continuity test on the cable going from the reed switch to the RKP as my multimeter tails reached at the time but I've almost a whole real of alarm cable so I can extend it to the panel for the others.
I am guessing that these cables aren't broken as it dose register when the door opens or the PIR has been triggered as in engineer utilities on zone status changes from saying "tamper >65k/000R" to "Active", if either the brown or yellow had a break the EOL there would be broken and not able to see this resistance change?
Cheers
Gee