Possible Clues:

• North London area
• Hammer demonstrator's excessive claim to a London borough?
• London borough
• I mixed drink with style, here in London
• Traitor queen banished to north London suburb
• Is fish not about in this area of London?
• Drink in current fashion in London area
• Current fashion, imbibing alcoholic drink in chic part of London?
• I inform fashionable society about London's top borough
• NE London borough