If you try and sign up for it, it says
	Quote:
	
	
		
			
				Thank you for your interest! 
We are about to launch Wall+ soon. Please sign up to stay up-to-date; we will let you know once the product is available.
			
		 | 
	
	
 The Facebook link no longer works.
So it's either:
1. A scam. Perhaps harvesting email addresses of Virgin Media customers?
 
2. A deal with Bundl which has built the site and will operate the service?
On this page, the company offering the service is stated to be Bundl. 
https://www.virgin-media.co/terms-conditions
More about Bundl can be found at: 
https://www.bundl.com/about-us