I am afraid that the Apple Watch is not supported by Virginmedia, only Vodaphone, O2 and EE as stated on https://www.apple.com/uk/watch/cellular/ this is due to that not all mobile phone operators have the facility for using an electronic SIM including Virginmedia.
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
Glad looked as by reading your website you offer cellular, this is on the iphone SE and 3 series watch in the details states that this is a cellular watch, yet as the phone and the watch need to be on the same network this is not a true statement ? That was lucky back to Voda then.