Hi Tony,
Yes I couldn't agree more on the Virgin price vs service quality.
I've been running a few addresses with Openreach based VDSL and even a Full Fibre address too and honestly even the connection thats rather slow clocking in at around 32Mb/s download and 8Mb/s upload (due to long line length back to fibre cab) works a treat (with TalkTalk/Sky)
I recently switched off my Virgin 350Mb service and switched all over to my backup line with EE (runs at 52Mb/s down and 19Mb/s upload) and honestly despite the loss of 300Mb/s I've only seen the service improve overall, much better for working from home.
If its reliability your after I think your in for a treat switching over to Openreach based service, just depends on your location, for an in-depth look at what to expect at your address you can look your address up here https://www.broadbandchecker.btwholesale.com/#/ADSL/AddressHome
This tool will tell you the worst and best to expect from speed with ISP's using the Openreach network (such as BT, Sky, TalkTalk and many others)
You may even be suprised to be in a full fibre area 🙂
Let us know if you need any more assistance or have further questions