Unless I've missed something, only Births and Deaths available as PDFs currently.
Guys links from a couple of posts ago show what you get 
I wonder, does it?
If you read what the GRO tell us about Pilot phase 1-
“Pilot phase 1 (approx. three week duration)
PDF copies of those civil registration records that are held by GRO in a digital format (i.e. birth entries recorded 1837 - 1934 and death entries recorded 1837 - 1957, in addition to those much more recent events captured electronically at point of registration, which include birth and death records registered 2007 onwards, civil partnership records registered December 2005 onwards, and marriages registered 2011 onwards). These PDFs will cost £6.”
It does mention civil partnership records registered December 2005 onwards, and marriages registered 2011 onwards.
Now I assume to get those records we would have to visit one of the 7 sites that hold the indexes, though I am not sure how up to date these are.
Search the index for the reference number of the entry and order using that reference number.
The 7 sites are-
Birmingham Central Library
Bridgend Reference and Information Library
City of Westminster Archives Centre
Manchester City Library
Newcastle City Library
Plymouth Central Library
The British Library
Having said that the GRO were saying that the only uncertified copies would be from the Historic registers so it seems one hand does not know what the other hand is doing.
Cheers
Guy