The V6 may be losing connection to the Hub for a number of reasons. Most likely is if you have it connected by wifi - do you ? If so connect it with a Cat6 ethernet cable and see if the issue goes away. This needs only to be temporary "test" if you have to trail cable between rooms over carpet etc). If it does fix it then you have identified the problem and there are ways to "fix"it. However the Tivo having the same issue may suggest that there is a more general network connection issue to your property. Can you post up the Upstream, Downstream and Network Logs from the Hub settings as that might reveal that. Also, you could set up a free “BQM” to continually monitor the state of your connection and record any dropouts. It does it 24/7/365 and it keeps a visual record of all your network disconnections, useful data to have in discussions with VM. If it shows any "red bar" dropouts and these are at the same time of day as your TV problem then that pinpoints the issue.
Cheers for your post - sorry that you're having some connection issues.
Is this just happening on your Tv boxes or are you seeing the same issue with your broadband connection?
You can ensure that your Tv boxes are connected to the network via this simple check:
Home> Help&Settings> Settings> Network> Connect to Virgin Media Service Now
Give that a go and let us know how things are.
If you find you are also having the same issues with your broadband, it may be worth doing some diagnostics via our free Connect App; this can assist you in checking for any issues in the home which may be causing your fault.