Word to the wise though i haven't read the 2 you've posted but the Daily Mail is notorious for blowing things out of proportion .
I heard the British press in general is notorious for blowing things out of proportion

But there's no denying in the fact that crime in Britain is pretty bad. Maybe not as bad as the USA, but still pretty bad. And the thing is, wherever there's crime in Belgium, Scandinavian countries, etc...they always put the blame on immigrants. But in Great Britain a lot of the indigenous people also seem to be involved in a lot of crime.
Unfortunately they do blow things out of proportion. It's due to our size, our media feel the need to make a mountain out of a molehill in what I can only speculate is a pissing contest with other countries of larger mass.
On a side note: The UK's crime rate is going to be considerably smaller than that of the US due to the astronomical difference in population.
Finally, the indigenous of the UK are more violent than the foreign influences. We have a number of organized criminal gangs (this term is used loosely) who routinely practice violence. We have a large biker gang following, Football hooliganism, the London firms, smaller gangs in other major cities, and the Scottish have their own brand of criminal gangs who are incredibly violent, most of which are 80%-90% indigenous membership.