This question spawned some comments, some of them highly upvoted, mentioning that seeking asylum in NKorea might not necessarily be a good idea. Most of these comments were removed.
Now I understand that in theory, as per the rules of this website, these comments were off-topic, while the question is a good, on-topic question that may (and should) be answered.
The problem is that it is plausible to suspect that behind this question may really be a person who seriously considers avoiding imprisonment in UK by fleeing to NK.
I would say that these are exceptional circumstances that would justify witholding the strict rules of this website. Have mercy upon this man who may soon attempt to make this mistake.
They will, obviously, do as they choose and if they're adamant to flee to NK we cannot stop them; however, the least we can do is to warn them they've chosen one of the worst possible destinations of their defection.
In fact, I would say that this question probably deserves an answer that sums up the resources about the quality of life in NK as well as how people there are likely to be internmented, executed or tortured for extremely slight reasons; since this is probably too much, I at least propose to allow a few off-topic comments.