Escape London: Overthrone

There was one padlock which had not been reset which left us unable to progress before receiving two clues enabling us to work out that is what happened. The bigger complaint is that there is no sign posting between the many padlocks and the puzzles leaving you continually trying the code in 4 places at a time (or 5 had the other padlock been in place). Other rooms I have played with this problem simply add a mark of some form on each puzzle. It is also not clear which puzzles are in play which is another avoidable issue, eg with lighting.