whilst this might well be down to a badly configured data center (highly possible)
we should also bare in mind the crazy amount of construction going on in the local area.
the whole situation is a mess however - we get a few events a year that show how fragile it all is, most hidden from public view but when you're monitoring over 100,000 pc's on various networks all over the UK you get a good idea when "one bad router" ends up affecting networks in a (geographic) quarter of the country.
where i work we saw no outage, only those working from home (on crappy residential broadband) were intermittently unable to join lync meetings. redundancy IS possible, as long as you're willing to pay for it.
AWS availability zones appear to have kept the site up as well, no dip in traffic that we can see.