Factual error: When Bourne is traveling to London on the Eurostar from Paris, immediately after the 'flashback' where Marie floats away after being killed, there are two helicopter shots of the Eurostar traveling to London. The second (far away) shot shows the train passing over a motorway. The train is actually traveling towards Paris, and therefore away from London. The motorway is the M20 and the bridge is approximately 3 miles west of junction 9 for Ashford (Kent). The train would have been 10 minutes away from entering the Channel Tunnel.
Factual error: When Jason is at the internet cafe googling the financial company, the address that comes up for Sydney is not technically possible. The street name (Market Street) is real, but the street number was 18017 which is not possible as the street is only a few blocks long and ends at about 400.
Factual error: When the first assassin drives to Waterloo station to take out Simon Ross and Bourne, he is driving a BMW 3 series with a 2006 UK licence plate. However the events in this film are meant to follow on six weeks after the previous film, which make it still set in 2004.