And I will email the thread to a few companies and see if they will do something about it.
There are threads about this so often that there is clearly a market for it.
All suggestions gratefully welcomed.
So, I will start
I think that something in a smartish waterproof but breathable fabric (must be washable) with the following;
Style - A choice of plain straight, belted straight or A-line.
Colours - Black, Brown, Navy, Biscuit, Cream. Also seasonal colours would be good I guess.
Hood - Option of detatchable or not
Lining - zip out washable padded lining so you can wear on the tube to work without sweltering and zip it in when you go out in the cold. Choice of plain or patterned would be ideal.
Pockets - decent sized with a closing flap thing to fill with tissues and random crap