I've always installed bells-only intruder alarms. I don't get involved with monitored systems (too much trouble), fire alarms (too scarey) or wire-free systems (too rubbish).
I do some electrical work though nothing that involves 'Part P' work, CCTV systems and maintenance contracts starting at £30.00 per year. I provide a 24 hour call-out service and can repair or upgrade pretty much any burglar alarm system.
Some useful links;
For detailed, specific information and advice about any intruder alarm system go here.
The site is manned by experts with vast knowledge and experience which they provide absolutely free.
Got a Kindle? Put something worth reading on it;
Buy 'The Tale of the Ancient Marina' for the embarrassingly reasonable price of £5.99
Due to Amazon's terms and conditions the book is unavailable here
for a trial period.
You can buy the ebook or read it free on KDP Prime here; Amazon.com
or buy the printed book here; Lulu.com
"The Tale of the Ancient Marina" by Aaron David.