Possible Clues:

• Second Harry Potter book reviewed could offer boost to this London location
• Major road junction at eastern end of Knightsbridge in London
• Stop chasing villainous character, encountering difficult situation in London location
• Silly Harry reckoned without parking in West End location
• Coat, we hear, and short jacket, taken to joint in part of London
• Where Knightsbridge and Piccadilly meet
• Ropy red crank - he spouted in a London location
• Rumour of obscure recreational area to turn into London landmark
• London location supplying English pork and cherry pie