Yeah, but overall the total intentional homocide rate is roughly the same per capita. So in UK they are being killed with knives, lead pipes, ropes, drownings, and other weapons. Meanwhile in the US many would be vitims are killing their attackers.
Not true, overall, the homicide rate in the USA is far greater per capita than the UK;
"There were a total of 859 homicide offences recorded in 2004/05, an increase of one per cent compared to the previous year. " (http://www.crimestatistics.org.uk/output/page40.asp)
In the USA, in 2005, there were 16,692 homicides, according to the FBI (http://www.fbi.gov/ucr/05cius/data/table_01.html)
So our number of homicides is nearly 1/20th of yours. Per capita that's nearly four times our rate.
This disproves the argument that people will go use a knife or a bat if they can't get a gun. Simply, they have time to cool off if they can't take action immediately, and that saves lives.