Lee, I fully understand your position, but what is the root of the problem?
Using my situation as an example, OK I don't live or work any where near London ...
I have a hilly (read Pentlands) 10 mile commute each way.
4 days a week I wear shirt and tie office wear. not a suit I will grant you but not far off
1 day a week we have dress down days where the code is more relaxed
4 days a week I dress in lycra to cycle, 1 day a week I ride in wearing the clothes for the office.
I have absolutely no customer facing duties. All back office with meetings over the phone. I have to make an effort to actually see people face to face.
If I could lose the 4 day "smart" uniform I could ride in casual every day.
I have worked for places that have adopted this attitude in the past and believe it or not the business carries on without any problems.
Now I know your situation may require you to wear a suit for some reason, but I suspect that a lot of us are wearing one just because.