Yes all UK specification Cliosports (172, 182, and 197) come standard with a Thatcham Level 1 security device.
The alarm system is very good, our Theft claim statistics for all Cliosport models are excellent so this shows the alarm is good.
I personally wouldn't replace this alarm system with an aftermarket cat 1 as you wouldn't really be gaining anything (the aftermarket alarm may have a few extra features etc.... but as both are Thatcham Cat 1 you wouldn't receive any further discount on insurance or really gain any extra security)
You could look to spend the money that you were going to use for the new Alarm on a Tracker system instead, this may allow a further discount on insurance as well.
Or you could consider using the money to fit a barrier deadlock system, a snap off steering wheel or maybe secure window film as these would increase the security further on top of the factory cat 1.
Best Regards
Neil
Greenlight