Had a couple of phone interviews. One with SF head office, and then another with hiring manager in the London office. These took roughly 45 minutes each. I went for a physical interview in their head office which kept me there for about 4 hours meeting each team member which could have been good. Consider I nearly spent 6 hours and didn't get any feedback, this was a very disappointing session. Quite a lot of my time put in to not even get a courtesy reply. Lil bit lame guys!