Downgrade online is not possible
This page, https://www.virginmedia.com/help/broadband-tv-and-landline specifically states
Whether you’re thinking about changing your broadband package, TV or phone service, or changing your Virgin Media package by upgrading or downgrading it you can do it all here.
but you can't actually downgrade. Seems misleading to me.
I'm currently 6 weeks away and wanted to see what was available. After searching on here, and on the help site I've come to the conclusion that Virgin Media don't really care about there long standing customers. I don't post very often but have been with cable since the 90s.
Also, what happened to the roll out of the switch to digital phones, I was hoping that was being sorted before now as I was told that was going ahead 6 months ago! I ask as that is relevant to any downgrade discussions that take place. Will we finally be able to ditch the ridiculous requirement that we have a home phone!! ( May not be classed as such but there is an exorbitant cost incurred for not having it)