Disclaimer - I don't work for Virgin Media. I'm just another VM user trying to help out. My setup: V6 TV box, Vivid 200 Optical fibre with Hub 3 in modem mode connected to a Netgear R7000 router. Telewest/VM user since 2001.
As a Very Insightful Person, I'm here to share my knowledge. I don't work for Virgin Media.
@Stringy look into ScreenTimeLabs - they do a free version that gives you a very decent flavour of what is available and I eventually paid for the base software (£20 per year) and also their Web filtering (£8 per year)... this allows me to setup child profiles on almost all the devices in the house, so whoever logs in gets access appropriate to their age. I'm not sure what the limits are, but I have it setup on all our devices, so there is one profile for each of our 3 kids and it is on about half a dozen devices... they can even unlock our phones and have controlled access.
IF the app developer enables it, it also allows some restrictions within certain apps - e.g. Netflix = enabled, but Netflix profile is locked. But that doesn't work for Amazon Prime.
The main reason I got it was to control screentime, but it has proved very useful as it gives you a central control app/website where you can control and see all the internet search and browsing history of each profile.
The only devices that aren't covered are the Xbox (Microsoft Family takes care of this) and then the TiVo box, which is my main concern now as that has a YouTube "content restriction", but personal experience has repeatedly shown me that this doesn't work at all and there's no way to block YouTube... so hopefully you only have the SuperHub to worry about, not TiVo.