WaPo:

When police on a weapons raid swarmed a housing project after London’s 2011 riots, they seized a cache of arms that in the United States might be better suited to “Antiques Roadshow” than inner city ganglands. Inside plastic bags hidden in a trash collection room, officers uncovered two archaic flintlock pistols, retrofitted flare guns and a Jesse James-style revolver.

Also...

Britain has seen one mass shooting since its most onerous gun ban went through in 1997, with criminologists arguing that a 2010 rampage in the British countryside could have been worse had the perpetrator had access to stronger firepower. Today, law enforcement officials say ballistic tests indicate that most gun crime in Britain can be traced back to less than 1,000 illegal weapons still in circulation.

The core...

Statistics, however, suggest that the guns bans alone did not have an immediate impact on firearm-related crime. Over time, however, gun violence in virtually all its guises has significantly come down with the aid of stricter enforcement and waves of police anti-weapons operations. The most current statistics available show that firearms were used to kill 59 people in all of England and Wales in 2011, compared to 77 such homicides that same year in Washington, D.C., alone.

Combined, England and Wales has a population of 56 million; Washington, D.C., on the other hand, has an estimated population of 632,323. The UK, population 62 million, has "1000 illegal weapons still in circulation"; the gun buyback that recently happened in Seattle, population 600,000, netted 716 weapons in three hours. We could go on and on and on, and the information will keep telling us the same fucking thing: Guns are the problem.