They are true mate - a few visits to online biographies on him, and some articles such as these will point you in the right direction:-
http://www.theguardian.com/politics/2013/dec/06/conservative-party-uncomfortable-nelson-mandela
http://www.theguardian.com/commentisfree/2013/dec/06/follow-nelson-mandela-laugh-rightwing-fawning
http://blogs.channel4.com/gary-gibbon-on-politics/mandela-uk/27176
Though it probably says more about the Tory Party - and the type of people they champion to elect him as their leader.
As for being PM - we are currently in a coalition Govt - the Tories and the LibDems are 'running' the country. He didn't get enough votes to win outright.
Hopefully he'll get even less votes next time at the Election - the LibDems certainly will.
Sadly we are in the age of PR and spin, the demonisation of the poor, weak and working classes - and those that speaks up for them - all whilst the rich pay in less each year for the rest of us to pick the slack. 'Divide and conquer'.