Remember, this is the country with cameras
everywhere. I'm sure it was all just part of the War on Terror (TM).
Sadly, I can't help much with your weekend plans. London is so big, we didn't have time for much other than the many landmarks and trying out random restaurants and shops. Best advice I can give - and this applies pretty much anywhere - is not to be afraid to change your plans because you saw something that looks interesting from the street. Exploration is the best.
Off topic, I've been to Vienna twice but it has been about 10 years now and I am still anxious to return. What a wonderful city. Speaking of exploration, I got intentionally lost in Vienna once and found an awesome dessert store because of it
