I discovered recently that all signage left on the footway must leave at least 1 meter clear at the side, preferably 1.5 meters; the actual wording is “in no circumstances must the width of the footway be reduced to less than 1m, preferably not less than 1.5m” (Traffic Signs Manual chapter 8 clause D4.4.1). The sign in the picture below leaves a minimal 600mm beside a very busy and dangerous road. On a positive note, I found the Palmer Group, who put the signs there, very helpful when I phoned them and they said they would sort is ‘asap’. Given the narrow pavement and the big sign I will be interested to see what they do! Update: They moved the sign to a very suitable place within 12 hours. Great work and thanks… but next time please don’t wait to be asked!
Illegal signage – less than 1 meter available for pedestrians
I have also just produced a causality map for the area in question showing where people have been killed and injured by cars in the area over the past 25 years. Two people have been killed in that time (the two red dots), 12 people have been seriously injured (the 12 purple dots) and there have been many slight injuries reported to the police (blue dots).
Foxhall road casualties map
Pedestrian Liberation 
Would you mind explaining how you got that map? I’d love to generalise this kind of data, but have no idea where to find it