List of available free on CnCNet:
-Command and Conquer Tiberian Dawn
-Red Alert 1
-Command and Conquer Tiberian Sun
-Red Alert 2 (double check this, though I think it's fully free)
-Red Alert 2 Yuri's Revenge is treated as its own thing
The Remastered Version being £17.99 is definitely a bit much, so I will say it would have been better and more of a promotion thing if they had of made it lower cost to those who've proven themselves loyal, especially as most of those buying the game are Veterans of over 20 Years. Myself and @GENERALZOOL included, since growing up with the game for that time. Been playing Command and Conquer for so long, that I would easily say that I've clocked up at least 10,000 Hours. Considering that there is 8766 Hours in a full Year, taking into account the quarter of a day that is not usually counted, that is a lot of hours. Most of those on Red Alert 2 and Yuri's Revenge.
I wouldn't be so mad if the game had all of the craftsmanship that should have been present from day one. Since the game has its flaws, and some of those flaws are rather intense, for the time being, I'm still playing the Original Release from 1995-1996 (PC releases) and 1997 (PS1 releases). Yes, I own the Discs for PS1, and have it on PSN as well for PS3 (still got a PS3 to play it on).