Liz the Squeak: I've just read a massive biography of Richard III which argued the exact opposite point to you: that the Yorkist (Richard) power-base, in terms of number of troops and money, was overwhelmingly northern, and Henry VII's lot(Lancastrian)mainly southern and western. And it is ften said that Stanley's(northern) defection fro Richard's tipped the scales in the battle. Now, I havent a clue who's right, I'm no historian. I just mention that opinions differ on this question.
   In fact the book went on to argue that London's(and the south's) domination of England became decisive from Bosworth field on.