It's really not, since many of the releases of information about what the US is doing -- including the current one -- have other countries also neck deep in it. I mean, the actual spying in the article that this comment thread is attached to is done by the UK's GCHQ, NSA is just a consumer of the data.
Besides that the US are doing (almost) unique things among to most developed countries, for example I can not even imagine any EU country doing something like Guantanamo or having the death penalty. To make it clear again, I am not primarily angry because of the spying on its own but the sentiment as to human rights beyond it.
By the information that has publicly come out about the "black sites" operated by the US and its allies -- from which prisoners were later transferred to the not-secret facility at Guatanamo where at least a show of adhering to international humanitarian law was made, several EU countries were actively involved in the system, and the UK was not only involved but actually operated prisons in the system.
So, yeah, EU countries have, contemporarily with Guantanamo, done things as much like the worst aspects of the Guantanamo detention as is possible.
Skimming Wikipedia's most definitely totally truthy article on the subject [1] (actually, it has a lot of citations, so it should be easy to verify), the UK's only alleged black site was the US base on Diego Garcia, which is "UK", but not "basement in London".
[1] https://en.wikipedia.org/wiki/Black_site#Suspected_black_sit...
Edit (T+18 minutes): Wikipedia lists numerous other European countries as possibly being involved. Information is really sketchy -- they are called "black" sites. Another question is which officials in the lucky host countries even knew about it.