Before I start, I need to mention that I'm a system engineer working for a big tech company and I have fair bit of networking knowledge so you can go technical with me.
I saw that people from Virgin media actually responds to those questions, I wanted to give it a try.
I live in Dublin/Ireland (D2) and I constantly see 50-60ms latency towards Valve server(s) in Luxembourg. To my knowledge, EU-West region is hosted in Luxembourg. This situation affects my gameplay for both DotA2 and Counter Strike so the issue is not game related. I don't know when the issue first started but it's been like this for 4 months now.
I have 3ms latency on avarage to router (192.168.0.1) which is OK.
Disclaimer - I don't work for Virgin Media. I'm just another VM user trying to help out so my answers may be wrong If my answer solves your problem please mark it as helpful as it may help others My setup: Vivid 200 Optical fibre with Superhub 2 in modem mode connected to a Netgear R7000 router. Telewest/VM user since 2001.