Possible Clues:

• What's left of late by a lady's man to auspicious foundation accommodating the homeless?
• Spain and Portugal, for example, have representatives presumably responsible for promoting business in The Flats
• Key superpower spies presumably responsible for promoting business in The Houses
• Capital spies trying to get rid of The House
• Grounds for a chap getting final damages from those selling half of 17 down
• They may examine houses, say, going into each toilet
• Property dealers
• They presumably employ Home Secretary with Oriental government spies
• They presumably employ home secretary for Oriental government spies?
• Their signs may be seen where eastern country has a loo