This thread is a bit outdated now, but I’ve just written an article on the challenges of securing home automation networks when it comes to IoT: https://echoit.co.nz/securing-home-automation-networks/
Hi David, I was hoping to gain a bit more insight into what you have found from your research of integrating OpenHab with any of the UK based security suppliers/companies, or whether you decided to go down the “Smart DIY Home Security” route.
I’ve just started investigating the various sytems. It seems like the US market is a lot more mature, however the insurance question is a big one, regardless.
Some more insight into your adventures would be appreciated! 
Same, sorry if this would end up bumping an old thread, but that link doesn’t seem to lead me anywhere although I’m very interested in what you summarized.