According to an article in London's Financial Times:

President George W. Bush will not be hidden from the mass protests expected during his state visit next week, a senior police officer said on Wednesday.

Roads would not be closed to pedestrians and protesters would not be kept away, [said Andy Trotter, deputy assistant commissioner]. "There is no intention to spare anyone's embarrassment. It is not part of our policing plan. We will do what's necessary to balance security," he said.

What?! You mean granting citizens the freedom of assembly without herding them outside of large exclusion zones far from embarrassing visual contact? How un-American can you get?! Don't they know anything about our values? And all this time I thought they were with us...