My simple advice is to put the superhub into modem mode, and connect a router that is designed for cable/fibre connections like the TP Archer C50 AC1200 - cost £29.99. Since I did this I have had no more drop outs.
Using a router will also enable you to have access throughout your home which is not guaranteed with a superhub.
This shouldn't be necessary, but I thought I'd post an easy solution.
If that works then good, but other customers may want to be aware that the Archer C50 only has 10/100 ethernet ports, so although the wifi can communicate much faster between devices and the router, the internet connection coming out of the router for all wired and wifi devices is constrained to 100 Mbps. For customers on a 100 Mbps connection that won't matter too much if you're on 200 or above then they'll be unable to use the speed they're paying for.
I'm a Very Insightful Person, I'm here to share knowledge, I don't work for Virgin Media. Learn more
Have I helped? Click Mark as Helpful Answer or use Kudos to say thanks