Possible Clues:

• Family bankrupt right before career in affluent area
• Where people are both in and out of capital?
• Farm animals changed direction, with rain starting to hit area just south of London
• Where those in capital are out of capital?
• Devise block to berserk development finally in well-to-do area
• Cattle stopped running on river area where the rich live
• Farm animals doing less well — a blow in expensive area
• Affluent residential area
• Prosperous area in Berks with bottle cork popping
• String of wealthy suburbs