Missing speakers following update

Hi,

I ran update yesterday which seemed to hang/load for ages, and then eventually said about half of my speakers could not be updated, ran again and said my system was up to date.

Going into the app my media room zone (two fives connected to a one) are no longer listed in the app at all.  Unligging and repowering them, they flash white then solid white looking like they are connected to WiFi but and completely unresponsive, Alexi not activating.

 my living room (beam, surrounds and sub) is saying not connected. I've similarly repowered the devices and reset my router.