You can buy both seasons on dvd from amazon for £10.99 and its totally uncut and in correct aspect ratio (I think)
I have exactly the same one my friend bought me for my birthday and it is literally one of my prize possessions
It's on dvd on amazon for £10.98. I have the same copy I think and it has deleted scenes and all that good stuff
https://www.amazon.co.uk/Utopia-1-2-DVD-Fiona-OShaughnessy/dp/B00GUFCP16
Apparently the blu Ray version is just series 1 from what the reviews say so I'd go for dvd if you want both.
you have two options here...
The choice is yours...