I have sent this to the Mayor of London , Boris Johnson. Feel free to back me up here by copying and pasting your own email.
Dear Mr Johnson
When in London, especially in the Underground, which side of the walkway should I walk on?
In Paddington Underground, it says Keep Left.
I noticed exhortations to Keep Right on another station.
No wonder people in the Underground passages Keep Randomly Dodging, Weaving and Bumping in to Each Other.
Surely, what the pedestrian needs is a convention that motorists have had for many many years: Lateralisation of Flow.
Things go more smoothly, there is more flow and less friction if everyone keeps to the agreed side of the walkway. It is more natural, more efficient.
I anticipate that you may feel that your Conservative philosophy would not allow you to order everyone to walk on this side or on that. You may feel that the individual must be free to choose his individual path, free of external compulsion.
I agree, but would say by way of rejoinder that it is not a matter of compulsion, but of suggestion and facilitation. A Nudge, as your leader might say.
By doing this, you might go down in history with the epitaph, "He may not have made the trains run on time, but at least he made it easier for people to move about on crowded walkways."
Hoping that you will appreciate the commonsense, and also the low cost, of this proposal.
With kind regards
Dr Richard Lawson