And again, it gets to the safety net argument. It's not that the english are accepting shelter where the americans are not, it's that the english don't need to "accept" the homeless shelters in the first place because they are sleeping at home.
"A mixture of street counts and estimates indicated 557 people slept rough on any one night in London 5,678 different people slept rough over a year in London (April 1 2011-March 31 2012)"
"According to SFGov, the total number of homeless individuals and families in San Francisco for 2011 was 6,455."
There are definitely more homeless as percentage of population in San Francisco though.