Although not on Virgin boxes (yet)
Discovery Plus has a 12 month offer including Eurosport 1&2 for (entertainment and sport) £29.99 for 12 months
Previous subscribers can also upgrade and pay the difference with a prorata discount.
I signed up last Nov for £29.99 to top up to next July would cost me £18
Hopefully useful for someone
Also free for 12 months (entertainment) via SkyQ
6 months free (entertainment) for Vodafone pay monthly customers.
https://www.discoveryplus.co.uk/myaccount/products