I'm afraid there isn't a specific utility for this on the hubs but you can set up timed access for MAC addresses on your network if there are specific devices like a playstation or tablet that you'd like to block from 10pm.
Other than that you can hold the WPS button on the front of the hub to turn wireless on and off but of course this isn't exactly automatic.
I have now set this up for example I can see my Iphone is currently connected, however when I apply a MAC filter for all day every day it is having no effect. I did call Virgin Media helpline and they said that this functionality is not available until Hub 3.0 comes out.
I did check that the MAC address being show connected to the router matches the IP address of my phone, and added the following rule and clicked apply.
I was expecting the rule below to prevent my phone from connecting and using apps.