He craves for attention. This guy probably wanted to get arrested.
You don't stay two years without going out, to want to be arrested. I guess he's looking for support, maybe hundreds of people to gather in front of the embassy when he'll go out, with the hope to escape the police in the crowd?
After all, look at what happened to Bradley Manning. Secret courts, secret laws...
Meanwhile the UK police wastes millions of pounds watching an embassy (an utterly useless project) - and of course, there is financial crisis
Speaking about fair trials.. (there never has been a trial)