Personally, since my October FTTP install I've had a couple of outages the one last for 45mins [no details on the Zen outage page] after performing local diagnostics and confirming it was not a end user issue then calling BT support and them staying my SH2 is wrongly configured because I had disabled the Wi-Fi (stated for them to leave my config alone) but although the ONT and SH2 were stating online there was no outwards traffic and traces were not passing beyond the first handover point. I gave up and waited and about 15mins later service resumed without any power cycling etc.
What I find more annoying is the 14 days SH2 automatic reboot that has no option to be disabled - just in my opinion is a poor choice to resolve potential buffer overflow and firmware bugs when consider previous routers would stay up for months at a time and only interrupted due to power or service outages but due to DV hardware requirements I have little choice currently.
